Hunting Washington Forum

Equipment & Gear => Guns and Ammo => Topic started by: CP on March 09, 2017, 12:19:56 PM

Title: AR stopped cycling ??
Post by: CP on March 09, 2017, 12:19:56 PM: It was working fine, then turned into a single shot all of the sudden. Took the BCG out and it looks fine. What to check next?
Title: Re: AR stopped cycling ??
Post by: carpsniperg2 on March 09, 2017, 12:29:41 PM: Buffer and spring? is it picking up the next round out of the mag?
Title: Re: AR stopped cycling ??
Post by: CP on March 09, 2017, 12:31:49 PM: No, I don't think the bolt is coming back at all. I have to hand cycle the next round in.
Title: Re: AR stopped cycling ??
Post by: carpsniperg2 on March 09, 2017, 12:36:44 PM: My guess would be the loads you are running. Might not have enough power to cycle the action all the way. If you switched recently might be the problem. Check the buffer and spring is that's all good my guess would be the ammunition.
Title: Re: AR stopped cycling ??
Post by: jay.sharkbait on March 09, 2017, 02:05:20 PM: Gasblocks tight and timed and is the gastube roll pin installed?
Title: Re: AR stopped cycling ??
Post by: CP on March 09, 2017, 02:39:07 PM: Quote from: jay.sharkbait on March 09, 2017, 02:05:20 PM
Gasblocks tight and timed and is the gastube roll pin installed?

The gas block is loose. Appears to have migrated forward.
Title: Re: AR stopped cycling ??
Post by: jay.sharkbait on March 09, 2017, 03:39:10 PM: Quote from: CP on March 09, 2017, 02:39:07 PM
Quote from: jay.sharkbait on March 09, 2017, 02:05:20 PM
Gasblocks tight and timed and is the gastube roll pin installed?

The gas block is loose. Appears to have migrated forward.

That will do it
Title: Re: AR stopped cycling ??
Post by: CP on March 09, 2017, 03:58:52 PM: Radical Firearms upper - The GB is retained with 2 set screws but only one of them left a witness mark on the barrel. I assume the other one was never tightened. Nothing that 2 drops of blue Loctite can't fix but clearly a quality problem.

I hope that fixes it.
Title: Re: AR stopped cycling ??
Post by: biggfish on March 09, 2017, 05:42:39 PM: Did you build it or buy it? All the builds I've done there was only one indentation for the set screw the others you just crank into a bit. Perhaps the witness mark you referred to was not the alignment divot.

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Title: Re: AR stopped cycling ??
Post by: carpsniperg2 on March 09, 2017, 05:45:36 PM: I bet they just did not crank it down. You should be good to go now. Most barrel will only have one indent but lock both down for sure.
Title: Re: AR stopped cycling ??
Post by: hunter399 on March 09, 2017, 05:56:21 PM: Well that was quick,was going to help ,some of the clamp on gb don't even use the indent ,but never had a problem with them so GOODLUCK,if by chance that didn't work clean your gas tube .
Title: Re: AR stopped cycling ??
Post by: Mongo Hunter on March 16, 2017, 02:49:06 PM: Good call on the gas block. also check the gas key on the BCG, it should be tight AND staked.
Title: Re: AR stopped cycling ??
Post by: CP on March 17, 2017, 06:13:48 AM: I had it on the range yesterday and its cycling again. I only had one fail-to-feed which I blame on my reloading skills. The gas block should stay in place now that both set screws are tight with a dab of Loctite on them.

Thanks for all the advice.
Title: Re: AR stopped cycling ??
Post by: Alchase on March 17, 2017, 09:40:00 AM: Thanks for posting back with the solution to the problem!