I have a LARS Grizzly OPS-4 upper that I love, and it comes with it's own custom bolt catch. Basically like the typical bolt catch with the paddle sheered off of it. It causes me to have a dedicated lower with that bolt catch, which renders all my other rear charge uppers incompatible and vice versa. Anyone know of a bolt catch option that can make both my side and rear charger uppers universally compatible for the lowers? Or is there someone who can machine one? I think the standard bolt catch would work if the paddle was farther out from the side of the upper. Or would my problem be solved by a Magpul B.A.D. lever or other third party options?