How come you guys have,nt put together a rifle similar to the Armalite 180. You,ve got the bolt and barrel and recoil assm. from the model 17 bullpup. Use AR hammer trigger sear,mag catch and plasma cut a sheet steel lower and upper and bender to shape. Something along the lines of the old bushmaster rifle. If its cost effective you could use a Aluminum lower like the one on my old bushmaster rifle. I think armalites going to have big sales on their new 180. The only gripe I here are people that don,t like the poly lower. Myself I,m fine with the Poly,s and Zytel,s the lower on my M-17 is fine.