ProMag AA556R: Convert your Ruger 10-22 Into the Archangel rifle (Advanced Rimfire System). The Archangel allows you to use modern accessories and optics on your Ruger 10-22 carbine. Manufactured entirely from Mil-Spec battle proven polymers, the Archangel is no toy. The standard model includes: upper receiver housing with integral Picatinny rail and lower receiver housing with non-removable pistol grip featuring a built-in storage compartment, a 6-position Archangel combat stock with built-in storage in the stock extension tube, free-float handguard with Picatinny rails at the 12 and 6 o'clock positions and the Archangel muzzle device (barrel cover) with Picatinny rail and bayonet lug which accepts the Archangel Display bayonet. Includes extrended magazine release and 8 screws (minus original takedown screw) and installation requires only simple tools to drift and install (punch, screwdriver, allen wrench, rubber mallet).