The AI modification works well in a lot of different calibers. My elk rifle is in .280AI, and it gets me within 100fps of the 7mmRemMag with much less recoil and noise (although I use it suppressed), and better barrel life.
Altering tolerances, as in making the circumference of the optic ever-so-slightly larger……..yes. Nothing else, and that doesn’t hurt anything with a quality mounting system.
Properly Cerakoting a quality optic will hurt it as much as properly cleaning aluminum firearms, suppressors, and...
I don’t use ejection pattern for diagnosing. It’s not a good indicator, as it can be influenced by too many factors.
If it’s running 100%, leave it alone.
A 5.56 with a pistol-length gas system is going to be violent.
OP’s gun already has an adjustable BCG.
There is no “guessing” when you know what you’re doing. The likely culprits that I described can all be checked and certified against known specs and requirements.
The USMC tested all the aftermarket buffer systems available at the time, in an effort to increase the reliability of the M4A1 carbine.
Some of the systems tested were the standard USGI carbine buffer system, the Vltor A5 buffer system, the Geissele Super 42, and the JP SCS.
The JP SCS...
"Smoother" doesn't mean more reliable.
I don't care how "smoooooooth" my AR is if I am sacrificing reliability. "Reliability" is Number 1 on my list, but I guess I have my own heirarchy of criteria for what I require in an AR.
I build 'em AND I shoot 'em.
I build and service thousands of AR's a year for civilians and LE. I've seen every single brand of captured buffer system.
The JP Enterprises is by far the best one, and it isn't as overall reliable as a "standard" buffer system.
There is such a thing as "sample size". How many systems have...
This.
Tula is notoriously under-powered, and I’ve no idea what your reloads are like.
With that said, I build my personal AR’s so they’ll cycle everything from crappy Tula and PMC Bronze, up through M193/M855 +, and everything in between.
As non-military, if you can’t use whatever ammo...
Undergassed could be one or more of the following:
-gas port too small
-gas block misaligned
-leaking between the gas key and the carrier
-poor "seal" between the gas tube and the inside of the gas key
-poor seal in the carrier bore......could be due to gas rings, although it could be a...