Panzer Arms M4: This phenomenal M4 semi-automatic shotgun is quickly becoming legendary for rugged reliability you can count on in the most adverse circumstances and conditions. The M4 Tactical shotgun is light, durable, fast-handling, and an exact copy of the renowned name brand M4 with the famous A.R.G.O Piston-driven semi-auto action. This action is one of the best ever developed and cycles everything from target loads to the heaviest 3-inch magnums. These models come with the Standard Fixed Stock but under it is the pre-installed 3 Position Notched Buffer/Recoil Tube Assembly if you want to add an adjustable stock in the future. These M4s now come with ambidextrous controls to aid in easier manipulation. Panzer has included a Mil-spec Picatinny Barrel clamp for any lights or lasers you may want to add. A rail section runs along the top of the receiver and is perfect for optics mounting. If you do not wish to mount an optic, ghost ring sights come standard. The robust tactical design and legendary reliability of the action make this a must-have shotgun.