i have a post-ban bushmaster rifle. it has an m4, flat top upper with pinned izzy brake and an a2 stock. it is in great condition. would be willing to trade the whole rifle for a preban lower plus some cash. would also be willing to trade just the lower for a preban lower straight up or i could throw in some cash. obviously, these considerations will all depend on what you have to offer. feel free to email me through here or at firstname.lastname@example.org. thanks.