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9/17/2007 11:44:15 AM EDT
I'm having reliability problems with my Mk.18 clone SBR.  I'm currently running a LMT 10.5" upper with an AAC M4-2000 with an H2 buffer.  I can run about 60-90 rds through it in this configuration and I'll get a couple of FTF's/double feeds or when I insert a magizine and hit the bolt release the bolt will fail to release.  I take extra care of all my firearms and clean them thorougly within 30 minutes after range trips.  I realize that it's due to the fact that the gases/carbon build-up. Is there ANYTHING I can do to minimize this ?  How does the military do to prevent this ?  They obvioiusly run more  rounds through theirs than I do, so there has to be a more viable solution.
Thanks for the help.
9/17/2007 12:03:52 PM EDT
[#1]
Do you have the problem w/o the suppressor?

Also, have you tried other magazines?
9/17/2007 12:07:09 PM EDT
[#2]
It's fine w/o the suppressor and different magazines.  This weapon will serve as my primary SHTF /bug out weapon and I want to make sure that it will function 110% when/if the need arises.
9/17/2007 12:56:12 PM EDT
[#3]

Quoted:
It's fine w/o the suppressor and different magazines.  This weapon will serve as my primary SHTF /bug out weapon and I want to make sure that it will function 110% when/if the need arises.


90% it's the magazine.

newer ones almost always hang up like this, esp. when trying to chamber the first round. either use 'em a bunch until they work 100%, or if they are already used, mark them and set them aside as "training mags".


9/17/2007 5:54:26 PM EDT
[#4]
As already stated, I would check your mags.

Also, what kind of lube are you using and how much? I've ran 900 rounds through my LMT 10.5" w/ my KAC NT4 attached over two days without one malfunction. All I did was take the BCG out and hosed it down with CLP before the start of day two. So I doubt your problem is carbon build-up. Use LOTS of lube.
9/17/2007 10:19:20 PM EDT
[#5]
That might be the problem then, I'll get some lube and re-post my results.
9/19/2007 3:18:38 PM EDT
[#6]
Read this as well:
LMT + Suppressor
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