Caliber: 6.5 Creedmoor, 7.62 NATO. Rapid Engagement Precision Rifle. Capacity: Magpul 20 Round PMAG. Barrel: 16.1”, 20”, and 22” (6.5 CM only) stainless steel. 1:10 RH twist, 5/8x24 muzzle threads. Stock: Magpul PRS. Grip: Magpul MOE+. Sights: Low-profile flip-up Skirmish Sights. Weight: 10.5 lbs. Trigger: Geissele SSA-E 2-Stage Precision. Overall Length: 43.5”. Non-reciprocating side charging handle, 20-position tunable gas block, short-stroke gas piston system, Monoforge upper receiver with integrated rail-base, removable top rail design, removable barrel, fully ambidextrous lower receiver controls include bolt catch and release, magazine release, and safety selector. LWRCI Advanced Triggerguard, Skirmish Back-Up Iron Sights, Enhanced 4-port Ultra Static muzzle brake. Add $560 for Proof carbon-fiber barrel.