Why not? I have a mil spec in there now from Aero enhanced kit, its o-k but after shooting a geissele (sp?) and timney drop in, I would prefer to get something better in there... i dont think the geissele was a drop in but the timney definitely was, and it was pretty impressive.
Looking for a good drop in for my first AR build. Looking for a clean low poundage break, flat faced trigger preferred. Willing to trade some ammo + cash, also have some other goodies hanging around, lets see what you got. PM please.