Pretty much every AR manufacturer....I already have the stuff I need to convert it,plus a CZ with beaver barf,a box full of extra beaver barf and a full NEA accessories to do up another build.....so by rights I need 3 of these without furniture so I can have the full set.
I have having boxes of parts laying around taking up space,I've had to start building up Ar lowers and throwing all my left over parts on them and selling the rifles to make room.