Home Forums Classifieds GT Store Blogs Today's Posts Search Social Groups


Glock Talk
Welcome To The Glock Talk Forums.

Thread Tools Display Modes
Old 05-14-2008, 07:18   #1
Original "G"
Coogan's Avatar
Join Date: Nov 2003
Location: Eastern PA
Posts: 824
Caliber Marking Variations on Glock Pistols

Starting this off - I will modify as new info comes to light. It is not 100% (by a long shot), so if you know something, post here!


1st Variation - 9x19 on slide only (Austrian Proofed G17,G17L, G18 and G19, 1st and 2nd Gen)

2nd Variation - 9x19 on slide and side of chamber (Early 2nd Gen G17, G17L, G18 and G19)

3rd Variation - 9x19 on slide and top of barrel (All late 2nd Gen 9mm Glocks and all 3rd Gen)

.40 I know that the .40 caliber Glocks had at least 3 variations.

1st Variation: was simply .40 on the slide and .40 on the side of the chamber.

2nd Variation: The caliber mark was changed to .40 SW and was marked on the slide and top of the chamber. The lowest serial number I have observed is a G23 SL prefix, the marking ended between the CCP and CER range.

3rd Variation: The caliber marking reverted to simply .40 on the slide and top of chamber.

.357 SIG - two variations. I do not have any idea of the transition range.

1st Variation: .357 SIG on slide and top of barrel. CDZ-prefixed G31s are known to have this marking. These may be one of the rarest standard production variations to exist.

2nd Variation: .357 on slide and top of barrel.

10mm Auto - two variations. The first variant is within the double alpha prefix.

1st Variaition: 10mm on slide and side of chamber. To at least the UW prefix.

2nd Variation: 10mm Auto on slide and top of chamber.

.45 ACP - Two variations

1st Variation: .45 Auto on slide, .45 on side of chamber (no Auto)

2nd Variation: .45 Auto on slide and top of chamber

.45 GAP Note that prototype G37s were marked .45 GLOCK on slide. I assume the top of the barrel was the same.

1st Variation - .45 G.A.P on slide and top of chamber

.380 Auto

Unknown at this time, but I assume that markings will coincide with the above in the appropriate date of manufacture range.
USMCR 1997 - 2004
PAARNG 2011 - Present
Founder - Glock Collectors Club PA Glocker #39
Looking for G22 PE389US
Multiple Armorer Certifications

Last edited by Coogan; 05-25-2010 at 07:22..
Coogan is offline   Reply With Quote
Old 05-16-2008, 10:22   #2
CLM Number 291
Honk Honk
gruntmedik's Avatar
Join Date: Jan 2005
Location: Taylorsville, KY
Posts: 19,439

My understanding is the 357 SIG was changed to 357 with the finger groove/rail frames.
Look, we whipped the World's ass at the Olympics, we have an effin SUV rolling around on Mars, and now our Flag has a confirmed kill. How great is that?
gruntmedik is offline   Reply With Quote
Old 10-12-2008, 15:06   #3
Thread Killer
GSD17's Avatar
Join Date: Feb 2004
Location: Alabama
Posts: 8,371

Don't forget the 9x21, 9mmFX and 7.8x21AC

To view links or images in signatures your post count must be 10 or greater. You currently have 0 signatures.
- I will trade parts for full cap G17 magazines.
GLOCK Certified Armorer
GSSF Member
GSD17 is offline   Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT -6. The time now is 19:59.

GT Wiki
GT Blogs
Social Groups
GT Store

Users Currently Online: 1,094
330 Members
764 Guests

Most users ever online: 4,867
May 19, 2015 at 1:03