the bullet is gone before the bolt ever moves. as far as barrel flex so what as long as your ammo is really good the harmonics are the same and the bullet leaves the muzzel at the same point every time and hits in the same place. since were talking building a long range target rifle on a PSL kit I assume that the barrel OD will be increassed like in any target rifle. Funny how most of the AR guys who shoot varmints seriously dont have thin barrels like a original M16. a heavy barrel can be done on any AK platform as well.Here's a slow motion clip of the AK.
I can see barrel flexing going on.
The large bolt also racks the entire rifle.
This gun has repeatadly shot under 1/2" 5 shot groups with good ammo in 223. it shoots the same with or with out a gas system drilled or working. it out shoots 90% of the varmint style AR,s out there and likely all of the original profile barreld ARs. It runs a bent tapco blank is un tempered and I can twist the gun by hand if i want. It is the same reciver as any other AK and likely more flexable than many. If reciver flex were a Issue what I do with it would be impossable. I honestly feel I could put this barrel assembly on any of my recivers and it would shoot good. I honestly think the AR could be at a disadvantage with its alloy reciver and dissimular steel barrel as heat will warp these parts differantly as the gun warms up. Aluminum expands and contracts considerably more than steel. if the AK had been a american design trust me it would be as developed in the aftermarket as the AR is today and it woud be a very repitubale shooter. Id take a gun that is reliable in combate of over what ever the AR is suposed to be any day. I cant think of any other fire armthat has had more updates and band aid fixes than the m16/ar15. the Ak and AKM are basicaly un changed and still work. I am pro american but it dont mean we do every thing better and the arogance we show toward our stuff is a bad idea when it come to life and death on a battel field. I have been rediculed / laughed at on the range and field before untill the shooting stars and my groups are better froma $300 build.
this screw build will shoot and it has nothing to do with the reciver flex.