I have a PTAC AR 308 that I have built. It has a 18" cmmg barrel, slash heavy buffer, syrac adjustable gas block, ASR muzzle break and a PSA 308 bcg.
The main problem is the bolt gets stuck closed. I was able to muscle it open after some fidgeting. I have the adj. gas block open and the bcg would still hang closed. I was running the bcg wet for break in. I pushed through this and the bcg started to free up. Eventually the bolt would fte with the empty case in the receiver. I would have to hand cycle the charging handle to chamber the next round till I put the specwar on. With the silencer on it would cycle no issues.
So my first question is the heavy buffer too much with the adjustable gas block?
I had a gun smith verify the head clearance. The gun will hand cycle without any issues cold. Will the barrel and bcg lap each other till it fits correctly?
Should I try to polish the bolt where it mates with the barrel?
Thanks
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The main problem is the bolt gets stuck closed. I was able to muscle it open after some fidgeting. I have the adj. gas block open and the bcg would still hang closed. I was running the bcg wet for break in. I pushed through this and the bcg started to free up. Eventually the bolt would fte with the empty case in the receiver. I would have to hand cycle the charging handle to chamber the next round till I put the specwar on. With the silencer on it would cycle no issues.
So my first question is the heavy buffer too much with the adjustable gas block?
I had a gun smith verify the head clearance. The gun will hand cycle without any issues cold. Will the barrel and bcg lap each other till it fits correctly?
Should I try to polish the bolt where it mates with the barrel?
Thanks
Sent from my SM-N920V using Tapatalk