Crafted from high-quality Aluminium and hard-coat anodized. Accepts any AR-15/M16 style buttstock or pistol grip. Includes all necessary screws to mount your action and install a pistol grip. THIS VERSION DOES NOT INCLUDE A PISTOL GRIP OR A BUTT STOCK. This is the chassis system by itself so that you can use whatever furniture that you would like. To make this chassis complete you will need to supply your own pistol grip, receiver extension/buffer tube, backplate, castle nut, and buttstock. Includes pre-installed hammer spring adjuster.