I'm at 95% reliable with the 9" barrel in 22LR with:
Anderson pistol lower (make sure the lower has a low shelf, where the pocket behind the selector shaft is lower than the selector shaft)
RTB dedicated 9" upper, switched CMMG BCG and charging handle for the BB one.
Borbuddy BCG, charging handle
Borebuddy (steel/aluminum) adjustable Super Safety trip kit
GMR Super Safety
SWR Spectre II suppressor
CMMG stainless bolt weight, might try a BB adjustable bolt weight in the future.
15-22 mags
15-22 AR22 magwell clip
Blackdog 15-22 50 rd drum
CCI MM 40 gr RN ran well
CCi Clean did not work even in semi
I still get stoppages in the Super Safe mode but no dead triggers. I can just pull the trigger again. I can not do complete mag dumps but I get 1 or 2 singles then mag dump almost every time. I'm not sure if its my technique or the system. My 13 year old son is better at mag dumps than me.