Ok so I have a Palmetto State armory upper, carbine, 16" barrel, ATI poly lower. this info I think is inconsequential, but there it is. It is factory built, never or rarely fired...probably not more than a few rounds, why? becase it is a single shot AR at this point. Now I have considered the gas problems and buffer spring ect. but here is the deal.
You fire, the bolt may come back far enough to eject, or it may not, It will not come back far enough to chamber the next round. now there have been no FTF's or stove pipes, double feeds or anything like that. just charge it and fire again. I have dissasembled and cleaned every thing and it does the same. tried multiple loads.
I noticed while cycling though a mag manualy that the bolt/carrier would get stuck about an 1/8 of an inch back in the cycle and i would have to pull very hard or butt strike to get it to move out of lock. I examined the bolt and observed what appeared to be minor burrs around locking lugs, 800 grit finishing paper to smooth them out. ok long story short, I have been over the entire bolt and carrier, effectivly doing a manual brake in.
But literaly opperating the bolt by hand with the upper removed it locks and unlocks pretty well, but add a round into the chamber and the bolt will "catch"half way in its unlocking cycle. and I have to pry it unlocked with a brass cleaning rod. so with that book of a story, any clue to what may be going on here?
You fire, the bolt may come back far enough to eject, or it may not, It will not come back far enough to chamber the next round. now there have been no FTF's or stove pipes, double feeds or anything like that. just charge it and fire again. I have dissasembled and cleaned every thing and it does the same. tried multiple loads.
I noticed while cycling though a mag manualy that the bolt/carrier would get stuck about an 1/8 of an inch back in the cycle and i would have to pull very hard or butt strike to get it to move out of lock. I examined the bolt and observed what appeared to be minor burrs around locking lugs, 800 grit finishing paper to smooth them out. ok long story short, I have been over the entire bolt and carrier, effectivly doing a manual brake in.
But literaly opperating the bolt by hand with the upper removed it locks and unlocks pretty well, but add a round into the chamber and the bolt will "catch"half way in its unlocking cycle. and I have to pry it unlocked with a brass cleaning rod. so with that book of a story, any clue to what may be going on here?