This is the 18" GII SASS. The original SASS is used in many Law Enforcement agencies and SWAT teams across the country, and was the gun used by the winning sniper in the 2012 CAN AM Police games. DPMS has taken that tried and true performance and thrown it into a more versatile and lighter sniper platform. This rifle features a 30% weight reduction, 18" fluted stainless barrel, 4 rail free-float tube, Bi-Pod adapter, MagPul PRS stock, and Gen 2 MBUS.