The Elevation MTR (Mountain Tactical Rifle) is a premium lightweight tactical rifle offered at an affordable price. The Elevation MTR comes standard with a carbon fiber barrel a lightweight composite stock Zermatt Arms Origin action TriggerTech trigger and backed by Proof Research’s SUB MOA accuracy guarantee. – Base: Single piece pinned rail – Bolt Knob: Modified Ball – Muzzle: Finished/Threaded 5/8-24 With Thread Protector – Length of Pull: 13 5/8 inches – 1-8 Twist Rate