Four Position Gas System. 12 Gauge Semi-Automatic. The JTS M12AR 12 Gauge Semi-Automatic Shotgun features a 4-position gas system and a 5-round capacity. The M12AR has a blued finish and a Picatinny rail on top of the receiver, as well as open front and adjustable rear sights and a traditional AR-Style Stock. Shotgun For Shooting And Hunting. Compatible With Remington Chokes. This 12 gauge semi-automatic shotgun is a great tool for shooting and hunting also a great collectable firearm. It's also compatible with Remington chokes (Rem Choke) and includes a safety lever. JTS Quality And Engineering. Serious hunters and shooting sports enthusiasts demand the right products for the perfect shot. JTS engineering, quality and service meets that challenge. All their firearms are field tested and duty proven and relied upon for extreme accuracy at a fair price. JTS M12AR 12 Gauge Semi-Automatic Shotgun Specs Manufacturer: JTS Model: M12AR Caliber: 12 Gauge Capacity: 5+1 Chamber: 2 3/4" and 3" Finish: Black Stock: Black Hand: Right Action: Semi Automatic Barrel Length: 18.7" Overall Length: 37.99" Mags: 2 - 5 round mags UPC: SKU: M12AR