@DanKATL is correct. You can manipulate the bolt manually with no issues because your problem isn't mechanical...it's the gas system. Something is "out of balance". Either it's undergassed or the buffer is too heavy. The bolt isn't going all the way back, therefore not catching the next round...
No. Silicone carbide coated frames instead of stippling. It's like putting grip tape on your gun without the tape LOL (It's pretty permanent) Check "silicone carbide Glock" on you tube....
Yeah, I think he's a little too busy for very much social media/forum type stuff. I know at one time he was supplying services for multiple gun stores, doing his normal gunsmithing/coating (he can do both hydro and cerakote) and also designing/building his own integrated suppressor rifles.
He's...