Chamberings: 6.5 CM (20” or 22″ barrels, 1:8 twist, DI rifle-length gas system) and 308 Win. (18” or 20″ barrels, 1:10 twist, DI rifle-length or mid-length gas systems). Long-range rifle with an aluminum receiver set, proprietary barrel nut, and aerospace-grade carbon fiber handguard assembly. Comes with Christensen Arms carbon-fiber-wrapped barrel. Titanium side baffle brake, ⅝×24 threaded muzzle. Weight: 7.8 lbs.