The Panzer Arms AR-12 not only resembles the AR-15 / M16 rifle but the controls and function are also similar to that well-known platform. The Panzer line of AR-12 Semi-Autos has always been the most popular and well respected of the AR-12 shotguns in the marketplace but this latest model is an absolute home run. In fact, we fully believe that with this new generation of AR-12, Panzer Arms has hit on the ultimate combination of design and features. The new KMR Tactical model features an upgraded gas system with high velocity and standard velocity pistons, an improved and very versatile grip platform, a modernized KMR Key-Mod style vented handguard, and an internally threaded barrel with (3) choke tubes included (Full, Modified, Cylinder). In addition, this shotgun has beautifully styled polymer furniture that has a great feel similar to Houge. The buttstock has a built-in recoil pad with a newly designed ergonomic pistol grip that can be changed out with any number of other AR15 style grips allowing you to personalize your grip choice to your own preference if so desired. The flat-top receiver features a full weaver rail so mounting the optic or sight system of your choice is a breeze, and the shotgun even ships with a nice set of removable flip-up sights so you are ready to go right out of the box. This shotgun features the new and improved KMR fore-end which is slim and comfortable while still being rock solid and capable of attaching all of your Picatinny accessories. Chambered for both 2 3/4" and 3" shells.