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CarlosC
02-11-2010, 22:10
The question often comes up concerning the different types of AKs. After all, most of what is for sale out there is the AKM model, yet people commonly, and incorrectly, refer to all AKs as AK-47s. AK-47s are one type of AK, as are AKMs and AK-74s. So let me try to shed some light on this. As always, if any of my info is off or incomplete, please let me know so we can all benefit.
I have collected some of these pics over the years and can't recall all the authors or I would give them credit. I can still do that if anyone can validate the origin of a particular picture.

Let's go back to the very beginning. This is the original AK-47, or experimental Assault Rifle No. 1 (1947).
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/OriginalAK-47.jpg

Competitions were held from late 1947 to early 1948 with samples from Dementiev (KB-P-410), Bulkin (TKB-415) and Kalashnikov (AK-47). The results were inconclusive though with Kalashnikov's design not necessarily the best rifle since it suffered in the accuracy department. Regardless, Kalashnikov's design was reliable and that's what the Russians preferred. An order by the Ministry of Armament dated January 21st, 1948, directed both Izhmash and Izhmekh to assist in supplying parts and assemblies for the new rifle. They issued another order in May of 1948 saying that the main production for the new rifle would be done exclusively by Izhmash starting in January of 1949. While production started in mid-1948, official adoption of the AK-47 did not occur until June 18, 1949 by the directive 2611-1033cc of the Council of Ministers. It was formally named 7.62mm avtomat Kalashnikova, yet simply referred to as AK.

This is the first production style AK-47 with a stamped receiver. Two models were made of this first AK with a Type 1A and a Type 1B receiver. The Type 1B receiver had a stamped steel stock that folder underneath and toward the front of the gun, resting under the lower handguard. The picture below is of a Type 1A (fixed stock) receiver. All AK-47s come in 7.62x39.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47type1receiver.jpg

Here's a picture of one that is still going!
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/Russiantype1.jpg

Here is a picture of a Type 1B
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47Type1B.jpg

Quality problems with the stamped receivers forced Izhmash to switch to a milled receiver until a solution was available. This created the second type of AK-47 receiver, the Type 2A (fixed stock) and the Type 2B (underfolding stock). The new, milled receiver guns were named Oblegchyonnyj (Lightened) 7.62mm avtomat Kalashnikova (AK). Oddly, in the mean time, the Russians were still making the Type 1 despite the high stamped receiver rejection rate. Here is a Type 2A. Note the longitudinal cut just above the mag well that normally identifies the milled AK-47s. Also notice the socket that is added to the back of the receiver to accept the buttstock.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47type2receiver.jpg

CarlosC
02-11-2010, 22:15
The final version of the AK-47 receiver is the Type 3 built as either the Type 3A (fixed stock) or the Type 3B (underfolder). Quick differences between the Type 2 and 3 receivers include the deletion of the buttstock socket, the addition of the sling attachment at the gas block, and the alteration of the back of the receiver profile. Here is a Type 3A:
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47type3receiver.jpg

And a Type 3B underfolder:
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47Type3B.jpg

By 1959, the Russians had solved the problems with the stamped receivers and introduced the Type 4A receiver, which is stamped. This is the basic AKM receiver from which all AKMs and AK-74s originate. The Type 4A is made from a 1mm thick piece of stamped steel that is folded into the receiver shape and heat treated. Thicker, 1.5mm steel is used on Chinese, Yugoslavian, and some Bulgarian AKMs. Since it is a stamped piece of metal, all the parts that had been machined into the milled receivers now have to be made separately, installed, and then secured with rivets. The rivets all over the sides of the receiver are a simple way to spot a stamped receiver. Other changes made include the addition of a magazine guide dimple on each side of the receiver on 99% of AKMs, just above the mag well opening, 1000m sights (usually), recontoured barrel, new gas block, new (narrower) front sights, and a relocated bayonet lug. Although the original AKM receiver was used for the 7.62 round, it lent itself to other calibers, including the 5.45x39 (AK-74) and 5.56. Here is a typical stamped Type 4A receiver.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/RomyG1.jpg

The two rivets on the right (and their counterparts on the opposite side) are used to secure the rear trunnion, which secures the buttstock to the receiver. The one rivet on the left is a reinforcing rivet that spans the width of the receiver.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/Romanian/G5.jpg

The three rivets at the front of the rifle (and those on their opposite side) secure the front trunnion to the receiver. On the latest version of the Type 4 receiver, the Russians have added an additional rivet to the front trunnion. Just above the left-most rivet you can see the pin that secures the barrel (which is pressed into place) to the trunnion.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/Romanian/G1.jpg

CarlosC
02-11-2010, 22:16
While on the transition from the AK-47 to the AKM, let’s line up the two together and look at the differences besides the obvious machined vs. milled construction. This is a picture of the front ends of the two (well, actually three since I had this picture with an AK-74 too). Note the wider front sights on the AK-47 compared to the AKM, plus the different gas block, method of attaching the bayonet, and the location of the sling attachment loop.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/DSC00559.jpg

Here are some excellent pictures from a gentleman named Stottman, from another board. If you have not seen his collection of AK pictures, you are missing out.
A Russian AKM. Note the rivets.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AKMType4Acloseuprightside.jpg

And now a Russian AK-47 Type 2A receiver. Note the lack of rivets and the horizontal lightening cut above the magazine well. Those pins you see on the side are not rivets, by the way, but the pins for the fire control group.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-47Type2closeup2.jpg

No Russian AK-47s or AKMs were ever imported into the US until the Saigas came along. Kits have been imported however, minus receivers, so there are 90% Russian AKs out there. There is even one guy who specializes in rewelding milled receivers, so you could retain the original markings on most of the Russian receiver.

CarlosC
02-11-2010, 22:17
Next on the receiver types is the 4B, which is made for the underfolding AKMS rifles. This AK has the Type 4B receiver.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AKMType4B.jpg
Picture courtesy avtomatsinaction.

The Type 4C receiver was then added and it incorporated an accessory mount on the left side of the receiver to attach optics. Here is a picture of an AK with the mount…
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AKaccessoryrail.jpg
Picture courtesy avtomatsinaction.

…and with the mount and a sight mounted.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AKaccessoryrailwithoptic.jpg

The last of the Type 4 receivers was the Type 4D, which now incorporated a latch mechanism in the front left side of the receiver to secure either a solid or skeleton folding stock. Here is a Type 4C/D receiver with both the accessory mount and the latch mechanism.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AKaccessoryrailwithopticandlatch.jpg
Picture courtesy avtomatsinaction.

CarlosC
02-11-2010, 22:19
After the AKM, the Russians switched to the AK-74 and the 5.45x39 round, which as far as receivers were concerned, required very little modification to the Type 4 series. The rest of the gun is a different story however and only 50% of the parts interchange between the AKM and the AK-74 and those are minor parts like pins and springs. The very first AK-74s featured a fixed wooden stock and were simply called the Avtomat Kalashnikova obrazetsa 1974. Note the horizontal groove cut into the buttstock in the picture below. It’s a common myth that the groove was cut into the stock so that soldiers could tell the difference between AKMs and AK-74s in the dark. According to Mikhail himself however, the AK-74 actually turned out to be slightly heavier than the AKM it was replacing, so the groove was cut to bring the weight down.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-74.jpg

The first AK-74 rifles were later modified by the addition of plastic furniture. This was done as a result of the lessons learned in Afghanistan, where the harsh environment destroyed the wood used on the original rifles. Here is an AK-74 with the plum, fixed stock. The production run on these was about 3.5 million.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-74fixedplastickstock.jpg
Courtesy avtomatsinaction

Improving the AK-74 series, the Russkies next added a folding stock to the AK-74 series, and incorporated the improvement to some AKM receivers. This metal, side folding stock turned the AK-74 into the AKS-74 (So skladnym prikladom). This type of stock is known as the Type 2 stock, with the Type 1 being the underfolders.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/Aks74.jpg

The last change made was the change from the skeleton stock to a normal looking stock that folded and was made from plastic. This final designation became the AKS-74M or AK-74M (Modernizirovanniy or modernized). This stock is officially known as the Type 3 stock.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-74M.jpg

CarlosC
02-11-2010, 22:21
As a point of interest, there is a Type 4 folding stock, and that’s the wire folder developed by the East Germans and used by the Romanians and Poles on either AKMs or their versions of the AK-74.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/DSC03672.jpg

On East German MPi-KMS72 (AKM)
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/EastGermanMpi-KMS.jpg

On Romanian AIR (AKM)
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/RomanianAIMS.jpg

Polish Kbk wz 88 (Tantal) version of the AK-74
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/PolishTantal.jpg

On all of these examples, except the Tantal, the standard Type 4A receiver was used. The folding stock was designed to secure using the rear trunnion normally used for the fixed stock, thereby making production easier and having more flexibility. The Tantal however, had an extra safety selector on the left side and therefore used an iteration of the Type 4A receiver. The last unique version of the Type 4A receiver is the one used on the Hungarian AMD-65. This also featured a folding stock that stowed to the right, but the rear trunnion, swivel, locking system, and strut itself were unique to the AMD. As such, the AMD has cutouts in the rear of the receiver to accommodate the folding stock and cannot be changed to a fixed stock version.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AMD-65.jpg

CarlosC
02-11-2010, 22:23
Back to the AK-74…Most of the Commie countries outright copied the Soviet pattern AK-74, but they also added some of their own twists. For example, the FSB on the Romanian AK-74 rifles is unique because the bayonet lug is directly below the sight, where as everyone else placed theirs on an extension behind the FSB. This also required the Romanians to use a unique 22mm muzzle brake that was not interchangeable with the 24mm size used by the other countries.
Common lug and brake.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/AK-74muzzlebrake-1.jpg

Romanian lug and brake.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/Romanian/RomanianAK-74.jpg

The Romanians also decided to keep the 45 degree gas block from the original AK074 instead of changing to the new 90 degree style used in the modern AK-74 produced after 1977. Here is the original AK-74, circa 1974 (duh).
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/FirstAK-74.jpg

When the Warsaw Pact countries looked at switching over to the 5.45 caliber, some, like the Poles, asked about obtaining license rights from the Russians to manufacture their own AK-74s. The Russians however, made such a venture very expensive, so much so that the Poles decided to alter the basic design enough that they would essentially have a different rifle that still fired the common round.
Polish Tantals also use proprietary components on their version of the AK-74 and are probably the greatest departure from the standard AK-74 design from any country. The Tantal uses a different muzzle brake than standard AK-74s that permits the firing of rifle grenades, modified mainsprings, handguards, handguard retainer, gas tube, gas tube retainer, FSB, and a few other details. Tantals use a very unique combination of the standard AK safety selector on the right side of the receiver and a fire control selector on the left side based on the FNC design. The right side setting "Z" (Zabezpieczony) worked like the standard AK safety, while the "0" (Odbezpieczony) setting activates the 3-position selector on the left side. "C" (Ciagly) is for full auto, "P" (Pojedynezy ) is for semi-auto, and "S" (Seria) for a three-round burst on the fire control selector. On real Tantals, the ratchet mechanism resets itself after the trigger is released so pulling the trigger again gives you three rounds, not the remainder of what was left before you released the trigger.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/Tantalselectordetail.jpg
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/Tantalmuzzlebrakedetail.jpg

The AKM receiver also served as the basis for AKs in other calibers, especially the 5.56x45 NATO. The Russians, Romanians, Hungarians, Bulgarians, East Germans, Yugoslavians, and Chinese have all built 5.56mm chambered AKMs. The Bulgarians have also taken their manufacturing prowess one step further and built milled AKs in 5.56 and 5.45mm.

CarlosC
02-11-2010, 22:24
Offshoots. The AK design spawned other rifles centered around the 7.62x39 cartridge. First up in the Finnish Valmet, several version of the Valmet exist with both milled and stamped receivers, but most of what you’ll find are the milled, model 62. Internally, the Valmets are very close to AKs, but externally, they look nothing alike. Valmets are well respected for their quality and accuracy.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/ValmetRK62.jpg

Just a quick trip off the 7.62 AK family tree….The Israelis took the Valmet design and used it to create the Galil. The very first Galils were made using Valmet M 62 receivers, but the Israelis quickly discovered they needed to make the receivers stronger to handle the increased operating pressure of the 5.56x45 that the Galil would be chambered in. I believe this picture is from IMI.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/Galil2.jpg

Next is the Czechoslovakian VZ-58. All VZ-58s are milled and look like an AK on the outside, but that’s where the similarities end.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/Czechoslovakian/DSC00896.jpg

The VZ shares nothing with its AK cousin…nothing. Not even the magazine interchange. The operating principle of the VZ is a short stroke piston like the FAL, which smacks the front of the bolt carrier to cycle the action. There is no hammer, the VZ using a striker instead. The bolt and carrier look like a huge version of the Beretta 92’s falling block design.
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/Czechoslovakian/DSC00827.jpg

Okay, I'm done.

Jesu27
02-11-2010, 23:03
Awesome Post! I learned a great deal!

Any info reguarding the Yugo's, Tabuk's, Maadi's, or Norinco's?

plugger
02-11-2010, 23:38
It is nice to see someone sharing the fruits of his learning so others can be informed. Off to to Congress you go. I will keep this for me and my friends. Hey! is this the start of a new bible, religion, cult,or whatever. Sorry it's the second beer and I got a kick out of you great post. Now to save it, as I must. Do more of this, plz.

jwitagauge
02-11-2010, 23:43
This was awesome thanks for the post!

plugger
02-11-2010, 23:53
It is nice to see someone sharing the fruits of his learning so others can be informed. Off to to Congress you go. I will keep this for me and my friends. Hey! is this the start of a new bible, religion, cult,or whatever. Sorry it's the second beer and I got a kick out of you great post. Now to save it, as I must. Do more of this, plz.

Glocker08
02-12-2010, 00:48
This is really interesting stuff Carlos. I love learning about the history of different firearms, especially AK's. Thanks for posting. :thumbsup:

photoguy
02-12-2010, 07:21
Outstanding post!
Thank you

CarlosC
02-12-2010, 13:41
Awesome Post! I learned a great deal!

Any info reguarding the Yugo's, Tabuk's, Maadi's, or Norinco's?

I am working on a post for the Yugos and Chinese (almost finished). The Tabuks are really nothing more than a direct copy of the Yugo rifles, except for the markings. I'll have to think about the Maadis...there's already a good website out there on Maadis and I don't want to simply copy the information.

TerdSlayer
02-12-2010, 14:19
This post is just like reading a book, thanks for sharing your knowledge... Looking foward to what you post about the Chinese...

mrbray101
02-12-2010, 16:19
Thanks a lot for the write up! I learned a great deal from that, especially since I'm new to the AK world.

Definitely should be a sticky at the top.

Aceman
02-12-2010, 16:32
I am working on a post for the Yugos and Chinese (almost finished). The Tabuks are really nothing more than a direct copy of the Yugo rifles, except for the markings. I'll have to think about the Maadis...there's already a good website out there on Maadis and I don't want to simply copy the information.

What you are working on is a book Carlos...and I for one would absolutely buy it.

g29andy
02-12-2010, 16:51
Well done!

LEAD
02-12-2010, 17:32
Thanks carlos, informative as always.

I may be mistaken, but something I think is true, that a section is lacking is that the Polish Tantal had a selector option of burst fire that other AK varients did not. Sorry if don't think it to be note worthy, but I find it interesting.

my762buzz
02-12-2010, 17:34
http://img.photobucket.com/albums/v440/CarlosC/Guns/Rifles/AK%20reference/OriginalAK-47.jpg


hmmmmmmmmm......


http://www.rusmilitary.com/images/saiga410_handguard.jpg

Novocaine
02-12-2010, 17:36
Cool info. And pics! Few notes:
To my knowledge AK was adopted in 49, not in 48.

Until it became AKM the gun’s official abbreviation was AK, not AK-47. When the receiver was switched from stamped to milled the official name became “Oblegchyonnyj (Lightened) 7.62mm avtomat Kalashnikova (AK)”.

Official abbreviation of the latest 74 is AK-74M. It makes sense if you think about it. My hunch is that calling it AKM-74 would be a bit confusing. It is for the same reason the gun was not called AKM-74 initially even though it was based on AKM, not on AK. There can only be one AKM :)

And a bit off-topic:
The gun was originally adopted without bayo. Bayonet appeared first with the Type 2 receiver and was redesigned for AKM. AKM bayonet was patterned after the diving knife designed for the Soviet navy scouts by Lt.Colonel Todorov(?).

At different development stages the gun had features some people can’t imagine life without: thumb safety, bolt hold open device, gas regulator, aluminum magazines and even a telescoping monopod that was stowed in a front pistol grip. All, obviously, deleted.

my762buzz
02-12-2010, 18:07
Cool info. And pics! Few notes:
To my knowledge AK was adopted in 49, not in 48.

Until it became AKM the gun’s official abbreviation was AK, not AK-47. When the receiver was switched from stamped to milled the official name became “Oblegchyonnyj (Lightened) 7.62mm avtomat Kalashnikova (AK)”.

Official abbreviation of the latest 74 is AK-74M. It makes sense if you think about it. My hunch is that calling it AKM-74 would be a bit confusing. It is for the same reason the gun was not called AKM-74 initially even though it was based on AKM, not on AK. There can only be one AKM :)

And a bit off-topic:
The gun was originally adopted without bayo. Bayonet appeared first with the Type 2 receiver and was redesigned for AKM. AKM bayonet was patterned after the diving knife designed for the Soviet navy scouts by Lt.Colonel Todorov(?).

At different development stages the gun had features some people can’t imagine life without: thumb safety, bolt hold open device, gas regulator, aluminum magazines and even a telescoping monopod that was stowed in a front pistol grip. All, obviously, deleted.


Ok cool. I definitely want your take on why they went with a 90 degree
gas block and Romania optioned not to on the AK74 5.45 guns and how this benefits the evolving design. No one else seemed to want to discuss this a while back and this thread is about the variations.

my762buzz
02-12-2010, 18:09
Next

By the way, great idea for a thread.

banger
02-12-2010, 18:21
CarlosC

WOW, simply WOW!!!!

DB9
02-12-2010, 19:00
Great thread. I'm interested in possibly acquiring an AK sometime in the future. Thread bookmarked for later review.

AggiePhil
02-12-2010, 20:48
Carlos, I must give credit where credit is due. You have outdone yourself with this thread. Thank you for all the photographs and information. :thumbsup:

1911austin
02-12-2010, 21:02
This needs to be a sticky. Very good information.

j-glock22
02-12-2010, 21:41
Nice thread, very educational...

Novocaine
02-12-2010, 22:25
Ok cool. I definitely want your take on why they went with a 90 degree
gas block and Romania optioned not to on the AK74 5.45 guns and how this benefits the evolving design. No one else seemed to want to discuss this a while back and this thread is about the variations.

Well, the reason Russians went with 90 degree gas block (and made sure that the port hits the groove, not the land) is because the original slanted hole created the elongated oval footprint on the barrel that was sheering the smaller and faster 5.45 projectile. It took several years to detect and nail the problem.

I don’t know about Romanians but suspect the reason they stayed with AKM-type gas block is economics. Russians did not exactly share the AK-74 technology the way they shared AK-47 technology so those allies who decided to adopt 5.45 were left to go through their own teething problems. When Romanians designed MD86 Commando which had to have a new gas block integrated into the sight base they went with a 90 degree gas port.

Chinese used even more straightforward approach- drilled smaller hole. :)

my762buzz
02-12-2010, 23:39
Well, the reason Russians went with 90 degree gas block (and made sure that the port hits the groove, not the land) is because the original slanted hole created the elongated oval footprint on the barrel that was sheering the smaller and faster 5.45 projectile. It took several years to detect and nail the problem.

I don’t know about Romanians but suspect the reason they stayed with AKM-type gas block is economics. Russians did not exactly share the AK-74 technology the way they shared AK-47 technology so those allies who decided to adopt 5.45 were left to go through their own teething problems. When Romanians designed MD86 Commando which had to have a new gas block integrated into the sight base they went with a 90 degree gas port.

Chinese used even more straightforward approach- drilled smaller hole. :)

Its amazing what pressure behind a bullet or shotcup can do sometimes.
The saiga 12 shotguns which are smooth bore and have the 90 degree blocks
still can occasionally shear off a piece of plastic shot wad or cup that end up in the gas system. This is considering there is no land edge sticking inward and the hole is perpendicular to the bore. So, essentially, the pressure behind the wad has distorted the wad top profile upward into the gas port hole as it passes and the curved edge of the port hole intersecting the bore on the muzzle side shears off the plastic material.

G23c
02-13-2010, 03:05
CarlosC, great info, thanks for the excellent post.

CarlosC
02-13-2010, 08:15
This is what I am looking for...anyone with additional information or clarification.

Cool info. And pics! Few notes:
To my knowledge AK was adopted in 49, not in 48.

I double checked...I have one source that states Kalashnikov was informed in 1947 that his design had been slated for acceptance by the Russian Army. An order by the Ministry of Armament dated January 21st, 1948, directs both Izhmash and Izhmekh to assist in supplying parts and assemblies for the new rifle. They issues another order in May of 1948 saying that the main production for the new rifle would be done exclusively by Izhmash starting in January of 1949.

Until it became AKM the gun’s official abbreviation was AK, not AK-47. When the receiver was switched from stamped to milled the official name became “Oblegchyonnyj (Lightened) 7.62mm avtomat Kalashnikova (AK)”.

Official abbreviation of the latest 74 is AK-74M. It makes sense if you think about it. My hunch is that calling it AKM-74 would be a bit confusing. It is for the same reason the gun was not called AKM-74 initially even though it was based on AKM, not on AK. There can only be one AKM :)

Excellent info.

And a bit off-topic:
The gun was originally adopted without bayo. Bayonet appeared first with the Type 2 receiver and was redesigned for AKM. AKM bayonet was patterned after the diving knife designed for the Soviet navy scouts by Lt.Colonel Todorov(?).

That's correct, the bayonet was only fitted on the two latter milled receivers and on. Those would be the M1951 bayonets. The next one was the M1959 bayonet, which have the round pommel. The square pommel bayonets are the M1974 models. The newer style you see mostly with AK-74s is the M1983 model.

At different development stages the gun had features some people can’t imagine life without: thumb safety, bolt hold open device, gas regulator, aluminum magazines and even a telescoping monopod that was stowed in a front pistol grip. All, obviously, deleted.

Don't forget about the holes drilled into the barrel to act as a recoil compensator, the two piece gas piston/bolt carrier and, at one point, a two piece receiver that was hinged like an M-16's.

CarlosC
02-13-2010, 08:19
Ok cool. I definitely want your take on why they went with a 90 degree
gas block and Romania optioned not to on the AK74 5.45 guns and how this benefits the evolving design. No one else seemed to want to discuss this a while back and this thread is about the variations.

I'll have to dig up the source, but I read somewhere that while the gas block is the 45 degree style, the hole is 90 degrees. I t would be nice if someone who has removed one could verify that.

LSU Snapperhead
02-13-2010, 09:04
Thanks for all the info carlos. I always learn something new from your posts. Keep it up.




later

GIockGuy24
02-13-2010, 09:20
The original gas port in the barrel was drilled through the gas block. This made up for differences between parts. The AK's with vertical gas blocks have the gas port drilled in the barrel before the gas block is installed on the barrel of course. The RPK-74 seems to have angled gas block. This may be because it is a machine gun and it makes it easier to clean or the accuracy of a machine gun isn't as important as with a rifle. There is a tool to clean the vertical gas port though. The Galil has an angled gas port but it is a different angle than the AK angle. I do have a Romanian 5.45 rifle that I am going change the front sight block and the gas block on it, so I will be able to see how the barrel's gas looks. It's an early one with the thinner barrel and takes the 22mm muzzle brake. The later standard thickness Romanian 5.45 barrels may be made like the Bulgarian ones with a pre-drilled vertical hole.

GIockGuy24
02-13-2010, 09:28
North Korea originally made milled receiver AK-47's. Later they went to stamped European type AKM's. They have Hungarian-looking front trunnions with odd looking C-shaped rear trunnions and a ribbed trigger guard. North Korea made milled receiver RPK's from 1963 to 1975 and now makes stamped receiver 5.45mm AK-74's with steel magazines.

Glockdude1
02-13-2010, 09:54
:thumbsup:

DJ Niner
02-13-2010, 21:39
Another well-written/illustrated and informative thread; thanks, CarlosC!

Added to the list of CarlosC threads in the "already Stuck" thread (above), titled --

Sticky: Resources/links for AK owners/users...
http://glocktalk.com/forums/showthread.php?t=497434

jdavionic
02-13-2010, 22:01
Congrats on a job well done, Carlos. This should be a sticky. Very informative.

Novocaine
02-13-2010, 22:25
I double checked...I have one source that states Kalashnikov was informed in 1947 that his design had been slated for acceptance by the Russian Army.

Competition trials ended only on January 10, 1948.


An order by the Ministry of Armament dated January 21st, 1948, directs both Izhmash and Izhmekh to assist in supplying parts and assemblies for the new rifle. They issues another order in May of 1948 saying that the main production for the new rifle would be done exclusively by Izhmash starting in January of 1949.

Everybody knew from the get go the gun will be made at Izhmash, it was the only factory with enough capacity. BTW Izhmeh (at the time “factory 622”) was spun out of Izhmash (at the time “factory 74”) during the war. Basically, same people at the time.

I do find this May’48 order curious. At the time no one knew whether AK-47 can be made into a serviceable rifle. It failed the trials and there was no clear proposal as to how to remedy its shortcomings. Report by Izhmash with some 500 changes as a scope of an improvement work performed came only in December of 1948. And the resulting product still had to go through army trials.


AK was adopted on June 18, 1949 by the directive 2611-1033cc of the Council of Ministers.

mikeyU
02-13-2010, 22:44
great job, thank you

GIockGuy24
02-14-2010, 11:08
In 1948 the tests required the bullet penetrate a steel helmet at 1,000 meters. The original flat base lead core bullet wouldn't do it. The bullet was changed for a steel core boat tail. The shape of the bullet required seating in the cartridge case to a certain depth. The firearms, RPD (1944), SKS (1945) and AK-47 (1947) had already been designed for a cartridge length of 56.0 mm. The original case was 41 mm long. To fit the steel core bullet the case was shorten to 38.70 mm (rounded to 39 mm). The length of steel core bullet reduced powder capacity. A chamber pressure limit had already been set to enable large scale production of cartridge cases that would handle the pressure. The powders at the time couldn't be used to reach the desired velocity at the desired chamber pressure. In 1949 a copy of Winchester ball powder was developed for 7.62x39 that would work. Full scale production of 7.62x39 cartridges and weapons began in 1949.

my762buzz
02-14-2010, 13:32
In 1948 the tests required the bullet penetrate a steel helmet at 1,000 meters. The original flat base lead core bullet wouldn't do it. The bullet was changed for a steel core boat tail.

That almost sounds like the big topic a while back in that long thread.

The sighting in instructions on Ak-47.net state that once the rifle is sighted in, all shots will stay withing a 16" circle at 1,000 meters.

16" circle at 1,000 meters with AK??
I find this a little hard to believe....

Cool Breeze
02-14-2010, 22:13
Great job

As an owner of a VZ-2008 Century Arms......Love it, it would be great if it were known the reason the Czech's did not just copy the AK.

The VZ is very slim and light....one reason why I love this thing.

bisdak
02-15-2010, 00:12
GREAT informative thread........should be a STICKY.

CarlosC
02-15-2010, 21:42
I have incorporated information from LEAD and Novocaine into the respective original posts. Thanks guys.

CarlosC
02-15-2010, 21:47
GREAT informative thread........should be a STICKY.

It is. :supergrin: DJ Niner added it to http://glocktalk.com/forums/showthread.php?t=497434

DJ Niner
02-02-2011, 00:39
Bump.

Never Nervous
02-02-2011, 20:15
Looking to get an AK soon. Great information. Thanks to all.:thumbsup:

tx787
02-02-2011, 21:37
This post is sticky worthy, thanks for taking the time to put this together.

rem2429
02-03-2011, 10:00
Looking to get an AK soon. Great information. Thanks to all.:thumbsup:

Now that I have been educated, I'm thinking he meant AKM.

Great post. Thanks for taking the time to put that up.

g22od
04-17-2011, 22:31
Carlos thanks so much for this info. I have tagged it for future reference.

TheGrimReaper
04-18-2011, 10:01
Very nice post sir.

BENCH
04-18-2011, 18:39
Thanks for your time Carlos. Lot of good info, and time in researching must have taken a while.

Bench

muscogee
04-19-2011, 18:39
Great posts by everyone. Thanks.

mrmedina
04-19-2011, 18:53
Carlos! I Love you Man! Thank you for the post!!!!!!:thumbsup:

fallenangelhim
04-28-2011, 16:30
Lots of information. Thanks.

DJ Niner
01-07-2012, 23:03
A bump to keep it current.

wydglide
06-23-2013, 12:44
Carlos....I am totally Impressed!

G22Dude
06-23-2013, 14:53
Carlos....I am totally Impressed!

I was overwhelmed by all the knowledge posted there. I need to print that page just in case it ever disappears

retired guard
06-23-2013, 16:23
Thanks for sharing I learned a lot

CarlosC
06-24-2013, 19:55
Thanks guys, I appreciate it. If you have the time, look at some of the other informational posts I've also done on stuff like magazine origin identification. DJNiner has all of them put together.

HKLovingIT
06-24-2013, 21:24
Great post! Carlos you should write a book on AKs. Serious.

wydglide
06-25-2013, 04:31
Thanks guys, I appreciate it. If you have the time, look at some of the other informational posts I've also done on stuff like magazine origin identification. DJNiner has all of them put together.

CarlosC, off the wall Question how well made are the AKM's that are made here in Tennessee......sending PM