Specifications and Features: - Product Group: Air Rifles - Brand: Umarex - Caliber: .177 (4.5mm) - Ammo Type: Pellets - FPS w/Alloy Pellet: 1450 - FPS w/Lead Pellet: 1250 - Barrel Length: 19.5 - Total Length (inches): 48.5 - Capacity: 1 - Action: Break Barrel - Power: Reaxis Gas Piston - Trigger Action: 2-Stage Adjustable Trigger - Trigger Pull (lbs): 3.5 - Length of Pull (inches): 14.25 - Cocking Effort (lbs): 42 - A magnum velocity air rifle at 1450 feet per second with a .177 alloy pellet the Octane is one of the first two break barrel rifles introduced under the Umarex brand. The Octane incorporates both a gas piston and a noise dampener. This gun is unique in that its gas piston operates in reverse of other gas pistons on the market. Termed the ReAxis Reverse-Axis Gas Piston it has shown to provide an increase in velocity. Its SilencAir is a non-removable suppressor with five chambers that greatly reduce muzzle noise. The Octane also comes with a 3-9x40 scope all-weather stock and adjustable 2-stage trigger.