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3/19/2011 6:12:16 PM EDT
my lmt bcg will not catch on an empty magazine or if using the bolt catch.  any ideas why  it slips through
3/19/2011 6:20:41 PM EDT
[#1]
pics of bolt catch/BCG?

do you have another AR to try the BCG in/try different BCG in the LMT?
3/19/2011 6:34:35 PM EDT
[#2]
Are you talking manually as well?if so the catch could be broke,it could be mag related..is it happening both when its shot and then trying to manipulate the catch manually?
3/19/2011 6:36:15 PM EDT
[#3]
it wont catch manually either seems as if the trigger is kicking the bcg upwards over the catch
3/19/2011 7:10:23 PM EDT
[#4]
Did you build the lower receiver, or was it factory assembled?
3/19/2011 7:19:53 PM EDT
[#5]
try the bolt in another AR, try another bolt in your AR, that'll tell you where the problem is. I'm betting it's the catch because if it was dragging along the bolt you'd probably notice.
More info about whether this is a new problem, new rifle and you just started with it and had issues, or other new parts....
Pics as previously requested. Obviously SOMETHING is pretty out of spec if you can't even get it to lock in place manually
3/19/2011 7:33:02 PM EDT
[#6]
Who made your mags ?
3/20/2011 5:53:16 AM EDT
[#7]
its a lmt factory build, new problem, sorry i'm having hell getting pics to post.  recently added a magpul ubr to it.  seems like its in the buffer maybe spring not compressing right
3/20/2011 6:51:21 AM EDT
[#8]
Quoted:
its a lmt factory build, new problem, sorry i'm having hell getting pics to post.  recently added a magpul ubr to it.  seems like its in the buffer maybe spring not compressing right


Had the same problem once ,turned out I had put the wrong buttscrew in.
It was to long. It would not let the bcg go back far enought to catch


3/20/2011 7:35:10 AM EDT
[#9]
was it with a ubr stock?  what screw would it need
3/20/2011 7:42:43 AM EDT
[#10]
Yes UBR, I had to use a shorter screw, like the old A1 style
or carbine lenght
3/20/2011 8:55:51 AM EDT
[#11]
Could be a few things...
As previously asked:
- What brand of Mag or mags? Some of the Korean Knock offs have been known for this issue.
- Have you tried BCG in another?  If same issue, could be the bolt.  If not, might be the receiver or Bolt catch out of spec.

Pics may help... and if you have search ability (member) there are a few threads similar issue.

3/20/2011 9:23:23 AM EDT
[#12]
i only use pmags bout to head to my brothers house to try different bcg
3/20/2011 11:13:25 AM EDT
[#13]
Quoted:
its a lmt factory build, new problem, sorry i'm having hell getting pics to post.  recently added a magpul ubr to it.  seems like its in the buffer maybe spring not compressing right

This is where you want to troubleshoot.

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