GlockTalk.com
Home Forums Classifieds Blogs Today's Posts Search Social Groups



  
SIGN-UP
Notices

Glock Talk
Welcome To The Glock Talk Forums.

Reply
 
Thread Tools Display Modes
Old 09-29-2012, 13:04   #1
MississipVol
Senior Member
 
Join Date: Apr 2012
Posts: 172
First Time at Range: Question

I took my Colt LE6920-MP to the range for the first time this morning, shooting a total of 100 rounds.

Although I didn't use the crazy advice from my LEO friend (to pour motor oil down the barrel after the first mag) I DID clean the barrel after the each 20 round mag with Breakfree CLP.

Here is my question:

I loaded each mag with 20 rounds and out of 5 magazines, the bolt didn't lock open after the last round of the 3rd and 4th mag. I know a gun may need to "break in" but wanted to see if this is anything I should be concerned about.

Other than that, there were no other issues whatsoever. No jams or anything. I used PMC bronze 55 grain primarily but did shoot one 20-round box of MFS 62 grain ballistic tipped zinc plated steel cased ammo.

TIA for your responses!!
MississipVol is offline   Reply With Quote
Old 09-29-2012, 13:30   #2
Airhasz
Senior Member
 
Join Date: Feb 2012
Location: Bad Axe
Posts: 535
What kind of magazines are causing the problem? Breaking in should have nothing to do with magazine operation.
Airhasz is offline   Reply With Quote
Old 09-29-2012, 13:32   #3
MississipVol
Senior Member
 
Join Date: Apr 2012
Posts: 172
Quote:
Originally Posted by Airhasz View Post
What kind of magazines are causing the problem? Breaking in should have nothing to do with magazine operation.
I am using the 2 magpuls that came with the gun. But I don't think its a magazine issue is it? The issue is the bolt is not locking back after the last round shot.
MississipVol is offline   Reply With Quote
Old 09-29-2012, 13:43   #4
Cole125
Silver Membership
Senior Member
 
Cole125's Avatar
 
Join Date: Apr 2008
Location: Far West, USA
Posts: 7,593
The bolt not locking back is most likely a magazine related issue or;

A. Underpowered ammo

B. Issue with gas system

C. Issue with bolt catch

B and C are highly unlikely with a Colt however.
Cole125 is offline   Reply With Quote
Old 09-29-2012, 14:33   #5
MississipVol
Senior Member
 
Join Date: Apr 2012
Posts: 172
Quote:
Originally Posted by Cole125 View Post
The bolt not locking back is most likely a magazine related issue or;

A. Underpowered ammo

B. Issue with gas system

C. Issue with bolt catch

B and C are highly unlikely with a Colt however.
They are brand new Magpul mags.

I cleaned it and put the bolt assembly back together. Is there a chance I didn't do something right? I mean....it fired fine. Just didn't lock back 2 of the 3 times.
MississipVol is offline   Reply With Quote
Old 09-29-2012, 14:53   #6
K. Foster
Senior Member
 
Join Date: Feb 2002
Location: Mo.
Posts: 2,107
Quote:
Originally Posted by MississipVol View Post
I am using the 2 magpuls that came with the gun. But I don't think its a magazine issue is it? The issue is the bolt is not locking back after the last round shot.
You are using 20 round Pmags?
30 rnd Pmags have an excellent reputation for reliability. However, some 20 round Pmags are known to have that issue from time to time. Use a permanent marker or a paint pen to number your mags so you can easily identify problem mags.
__________________
An amateur trains until he gets it right, a professional trains until he can't get it wrong.
K. Foster is offline   Reply With Quote
Old 09-29-2012, 14:54   #7
Trey83
Senior Member
 
Trey83's Avatar
 
Join Date: Feb 2010
Posts: 1,480
Next time your at the range, load the magazine with a single round and fire it a few times to see if it locks back. Make sure you're using quality ammo. Also make sure the rifle is lubed up.

My guess is that it's the mags.
__________________
Act as if what you do makes a difference. It does.
Trey83 is offline   Reply With Quote
Old 09-29-2012, 16:16   #8
Cole125
Silver Membership
Senior Member
 
Cole125's Avatar
 
Join Date: Apr 2008
Location: Far West, USA
Posts: 7,593
Quote:
Originally Posted by K. Foster View Post
some 20 round Pmags are known to have that issue from time to time.
I have heard this as well, come to think of it.

OP, next time you go to the range only take your 30 round P mags and see if you have any more issues.
Cole125 is offline   Reply With Quote
Old 09-29-2012, 16:51   #9
MississipVol
Senior Member
 
Join Date: Apr 2012
Posts: 172
Quote:
Originally Posted by K. Foster View Post
You are using 20 round Pmags?
30 rnd Pmags have an excellent reputation for reliability. However, some 20 round Pmags are known to have that issue from time to time. Use a permanent marker or a paint pen to number your mags so you can easily identify problem mags.
These are 30 round mags. I was just loading 20 in at a time.

I'll definitely try the suggestion to take a shot out of each mag to see if one is giving me the problem. Thanks!
MississipVol is offline   Reply With Quote
Old 09-29-2012, 18:01   #10
SCSU74
St. Cloud Proud
 
SCSU74's Avatar
 
Join Date: Jul 2010
Location: The Northwoods
Posts: 2,028
Never heard of breaking in an AR? I guess mine got broken in with the 2,500 rds we shot at patrol rifle school. Didn't do anything special other than add slip ewl to the usual spots on breaks. No malfunctions that I can remember. Was using 30 rd pmags fwiw


Sent from my iPhone... which probably auto-corrected something wrong
__________________
In Valor There is Hope
SCSU74 is offline   Reply With Quote
Old 09-29-2012, 21:39   #11
WoodenPlank
Who?
 
WoodenPlank's Avatar
 
Join Date: May 2010
Location: NW Florida
Posts: 7,777
"Breaking in" an AR is bunk. Pouring motor oil down the bore is even more bunk, and a good way to foul it pretty badly, I bet.

Mark your mags, and see if it's one or two mags doing it, or if it's across all of them.

What buffer are you using? What ammo?

As others said, load ONE ROUND (and use GOOD ammo - Federal XM193 or XM855, Black Hills, etc), and fire. See if the bolt locks back. Also, see if the bolt catch is engaging the actual bolt face (in front of the locking lugs) or on the carrier itself (behind the locking lugs). The first is good, the second is not.

Give us details of what it does, and we can help find the problem.
__________________
Never argue with an idiot. They will drag you down to their level and beat you with experience.
WoodenPlank is offline   Reply With Quote
Old 09-29-2012, 21:44   #12
K. Foster
Senior Member
 
Join Date: Feb 2002
Location: Mo.
Posts: 2,107
Quote:
Originally Posted by MississipVol View Post
These are 30 round mags. I was just loading 20 in at a time.
Noted.
__________________
An amateur trains until he gets it right, a professional trains until he can't get it wrong.
K. Foster is offline   Reply With Quote

Reply

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 13:07.




Homepage
FAQ
Forums
Calendar
Advertise
Gallery
GT Wiki
GT Blogs
Social Groups
Classifieds


Users Currently Online: 1,165
342 Members
823 Guests

Most users ever online: 2,244
Nov 11, 2013 at 16:42