The Panzer Arms M4 MARINE Tactical Semi-Auto 12G Shotgun, is a clone of the legendary M4 shotgun. Nickel-Phosphorus Plating for unparalleled corrosion resistance and durability, making it a stunning and reliable choice. Durable inertia driven semi-automatic 12 gauge shotgun. Featuring familiar handling, comfortable and ergonomic furniture, an extended tube magazine, and the M4 gas system. Includes 5rd magazine and choke tube set.