Thread: 300blk, ar15 or m16 style BCG

I'm in the process of collecting the final parts for my blackout build,

So far I've built my lower
Anderson Lower, carbine buffer, with magpul CTR and grip,
with standard LPK, with Seekins dress up bits,

Upper will be Aero Precission w/o forward assist,
Wilson Combat Match Grade Barrel, 300 AAC Blackout, 11.3", 1-8 Twist, Stainless, pistol Gas
and a 9" free float keymod handguard,
adjustable gas block,
Waitaki Suppressor

optic yet to be decided,

I plan to shoot mostly heavy Subs with it,

now what i need help deciding on is a BCG,
M16 or AR15 style?

other than the weight loss with the ar15 bcg,
are there any advantages/disadvantages to one over the other?