Convert your Remington 597 Carbine Into the Archangel rifle (Advanced Rimfire System) The Archangel allows you to use modern accessories and optics on your Remington 597 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 pistol grip (built in storage compartment), Six position Archangel combat stock (built in storage in stock extension tube), Free float handguard with Picatinny rails located at the twelve o'clock (top) and six o'clock (bottom) positions (additional rails may be added. PM003D is recommended) and the Archangel muzzle device with Picatinny rail and Bayonet Lug (Lug accepts Archangel Display bayonet).