Proof Research Elevation MTR 2.0 .300 PRC 22" Carbon Fiber Wrapped Match Grade Threaded Barrel, Black Cerakote Picatinny Rail Steel Receiver, Fixed Proof Tactical Flat Dark Earth Carbon Fiber Stock The Elevation MTR 2.0 (Mountain Tactical Rifle) is a premium, lightweight tactical rifle. It features our Sendero contour carbon fiber barrel, lightweight carbon fiber stock, Zermatt Arms Origin action, detachable box magazine and a TriggerTech trigger.