Overview of the Benelli MR1 Rifle. Benelli MR1 rifles are chambered in 5.56 mm NATO (.223 Remington) and use the battle-proven Auto Regulating Gas Operated (A.R.G.O.) system—the same system developed by Benelli for the M1014 (M4) and used for over a decade in multiple conflicts by the United States Marine Corps.
Benelli MR1 Rifle Specs:
- Caliber: 5.56x45mm NATO (.223 Rem)
- Barrel Length: 16″
- Stock: Synthetic with ComfortTech or Synthetic Tactical Pistol Grip
- Overall Length: 37.1″
- Average Weight: 7.9 lbs (w/o) magazine
- Bore: Hard chrome lined
- Twist: 1 Twist in 9 in, right hand
- Method of Operation: A.R.G.O. (Auto-Regulating-Gas-Operated); Rotating bolt
- Sights: Military-style aperture sights with picatinny rail
- Effective Range: 600m