I have a 10.5" BCA forged and parkerized upper with a faxon full auto profile BCG and Presma ambidextrous charging handle on a PSA multi-cal pa-15 lower with an SB5 brace. Has Odin works adjustable .750 gas block, strike industries flat wire buffer spring, Odin works adjustable heavy buffer weight, dirty bird single stage trigger, Hoffman tactical 3 position super selector, die free co kung fu grip, 45 degree iron sights. The gun will run the full magazine no problem, been a great gun just found something else I'd like to get