Special Operations Forces Combat Assault Rifle — Heavy. 7.62mm variant adopted by USSOCOM as the MK17 Mod 0. The primary SCAR variant in U.S. service; used by SEAL Teams, Rangers, and Green Berets. Modular design allows conversion between barrel lengths. Type: Rifle Action: Gas-Operated Caliber: 7.62x51mm NATO Capacity: 10 Year introduced: 2009, Belgium Weight: 128 oz Overall length: 37" Status: Active Military use: Yes Intended use: military