I built an AR using the EA billet set, and the set it self doesn't have a "problem" per say but I guess since the walls are thicker to add strength the magpul BAD lever I bought doesn't work. There is not enough clearance and the wall of the upper pushes against the backside of the lever pressing the bolt catch in causing it to rub against the bolt. My question is do you guys know if there is a different manufactuer who makes one of these levers that wouldnt have problems?