Benelli M4 Tactical Shotgun - 12 Gauge-3", 18.5" Barrel, Model 11794

U.S.M.C. Approved 
This piston-driven Auto-Regulating Gas-Operated (A.R.G.O.) system was designed for and approved by the U.S. Marine Corps.

Benelli’s patented Auto-Regulating Gas-Operated (A.R.G.O.) system is a simple, self-cleaning, piston-driven action.

• Standard Choke Tubes
  Standard choke tube M.
• Ghost-Ring Sights
• Drilled and Tapped Receiver

Auto-Regulating Gas-Operated
The A.R.G.O. system is a unique, short-stroke, dual-piston design developed for the M4 Tactical shotgun in 1998 for the U.S. Marine Corps. It was later adopted as the U.S. Joint Services combat shotgun—and remains so today.

 - The gas port is located just forward of the chamber, where the gases are hotter and cleaner. This results in less fouling and more reliable cycling.
 - Pistons push directly against the bolt, for fast operation and minimum vibration.
 - There are no connecting linkages or heavy action bars under the forend, which add weight.