12-gauge AR Shotgun

If you were getting tired of the Saiga-12, there is now another option for a semi-auto, box mag-fed shotgun. Intrepid Tactical Solutions has released the AR-12, a 12-gauge AR-15-style upper that fits standard AR-10 lower receivers. A larger, 8-round magazine has also been developed to fit the shotgun shells. The rest of the AR remains unchanged, aside from requiring a stronger, stiffer buffer spring.

The only main problem with the AR-12 is the requirement for specialized ammo. Standard 12-gauge shells do not work well in box magazines, primarily because the rims on each shell make them difficult to stack. Therefore, Intrepid Tactical Solutions actually designed a new, proprietary round just for the AR-12. The full-polymer construction shell features a "retracted" rim, and a round nose cone. While this is a great idea, I'm not sure how well this new ammunition will fair. Intrepid Tactical Solutions has stated that it has formed a partnership with a major ammunition manufacturer to produce the "RAS-12" shells, but the requirement of proprietary ammo is a bit of a setback in my opinion, and we all know too well that it's not easy for a new type of ammunition to catch on.