I am taking the jump into the NFA world soon, and to start I am planning on putting together a sbr ar 9mm and eventually suppressing it. I will be building it to accept 9mm glock mags via dedicated lower(lone wolf or ddles) so I can swap mags with my g19. I will also be purchasing a supressor to share between the two. So my question is this; what would you buy first, supressor or parts to assemble the ar(lower, etc)? I've got a about $1000 to spend at the moment and want to get the ball rolling.