The JTS Group M12AR is a gas piston style semi automatic shotgun designed to conform to an AR style platform sharing the ergonomics and aesthetics.This particular model features an 18.7" chrome lined barrel that is threaded for Rem chokes.The 3" chamber is compatible with both 3" and 2-3/4" shotshells. The 4 position gas system features adjustments should you need to make a change for a specific picky or light load.It runs off of a detachable box magazine and comes standard with polymer synthetic furniture.This version does come with an aluminum forearm which features M-LOK modular attachment points. The M12AR will serve you needs well for years to come so invest in a winner invest in a JTS Group shotgun.Features / SpecsJTS Group M12ARGas Piston Semi Automatic Shotgun12 Gauge3" Chamber (Accepts 2-3/4" and 3" Shotshells)18.7" Chrome Lined BarrelCylinder Choke (Rem Choke Compatible)4 Position Gas System for Adjustments Based on Loads5 Round MagazineDetachable Box MagazineRemovable Front/Rear SightsPicatinny Top RailStandard AR ControlsAluminum Forearm with M-LOK Modular Attachment SlotsFixed Polymer Synthetic StockA2 Polymer Synthetic Pistol GripOverall Length 37.99"Matte Black Finish