Benelli's A.R.G.O. system is a unique, short-stroke, dual-piston design incorporated into the M4 Tactical shotgun that makes it self-cleaning and exceptionally reliable. As a result, the M4 Tactical was selected for service in the U.S. Marine Corps. It was later adopted as the U.S. Joint Services combat shotgun-and remains so today. This superior semi-automatic shotgun has been battle-tested in combat theaters around the world, and it is known for its durability and effectiveness in a wide range of field conditions. The M4 Tactical incorporates the latest Benelli shooting technologies for optimal shooter comfort and recoil reduction. Here is the newest of the new Benelli M4 #11714. This is the brand new model with the 5-Position, straight telescoping stock and the Multi-rail, modular front rail for picatinny rail sections. This shotgun is in 12 gauge and has an 18.5 inch barrel. The capacity on this shotgun is 7+1. For sights, there are a set of ghost ring sights installed on the receiver and barrel, as well as a picatinny optic mount on the top of the receiver. This shotgun is so new that you may not even be able to find it on Benelli's website. If you are looking for the best of the best when it comes to a tactical shotgun, look no further than this new offering from Benelli! Accessories: Manual, Lock Action: Semi-Auto Barrel Color: Black Barrel Length: 18.5" Barrel Material: Steel Buttstock Positions: 5 Caliber: 12 Gauge Capacity: 7 Chamber: 2 3/4", 3" Choke: M Color: Black Forend Color: Black Forend Material: Synthetic Front Sight: Post Grip Color: Black Grip Material: Rubber Includes: Multirail Length Of Pull: 14.375" Magazine Type: Tube Operating System: Gas Rear Sight: Ghost Ring Receiver Color: Black Shell Length: 2 3/4 Inch, 3 Inch Stock: 5-Position Telescoping Stock Color: Black Stock Material: Synthetic MPN: 11714 UPC:650350117141