Went to the range today and tested the latest fix. H3 buffer, SBR buffer spring, Fail Zero BCG W/ O-Ring on extractor spring, Fail Zero Hammer, Titanium firing pin.
100% functionality!!!!!!!!!!!!!!!!!!!!!!!
I did a test of 15 rounds in a P-Mag and GI style mag as follows:
5 rounds steel cased Monarch .223 55gr
5 rounds brass cased PMC XM193 55gr
5 rounds M855 Penetrator 62gr
Everything was perfect. Spent another 100 rounds of mixed ammo in P-Mags and GI mags to check the zero on my EoTech and iron sights, and it was accurate enough to pass dept. qualification standards w/ 100% accuracy.
Glad to get this figured out. I have learned alot about AR-15s in the lat few weeks by replacing hammers, extractor springs, hand guards, barrel nuts, and a few other odds and ends parts. It's been fun reconfiguring all my weapons for their intended uses. Now it's time to go shoot 'em up!
Also, thanks to the hive for helping to figure out, and fix this problem.