ADM if ur steadfast in ur criteria.
My guess is the billet and integrated trigger guard and fairly arbitrary criteria. The flared magwell is beyond ez to add on later, but outside of night shooting not necessary.
Billet is less strong then forged and almost always heavier.. and the trigger guard??? I dunno, grab and LMt winter guard and rock on if u need drip.
Been around 3 aero lowers that weren’t in spec. If ur gonna spend an extra 200$ for the stamp, at least grab something you know is in spec.
