The Panzer Arms AR-12 KMR is the most recent generation (G4) of AR-12 comes with flip up sights and Key Mod attachment points on the handguard, as well as picatinny rail sections on the front end of the handguard. These G4 models come with the following improvements: an upgraded gas system from the factory, improved grip, a thin key mod handguard, and three chokes.
A picatinny rail across the top of the receiver allows for easy mounting of optics, in addition to the included flip up sights. It also comes with a very cool looking barrel shroud, and three chokes. The shotgun comes boxed, with two 5 round magazines, flip up sights, cleaning kit, manual, and one year warranty from the importer. Panzer continues to improve on some of the best AR 15 style shotguns on the market today.