The Harpoon is now discontinued. Hatsan Harpoon PCP Arrow Launcher Sidelever Pre-charged pneumatic 500cc black anodized aluminum air cylinder Maximum velocity: 580 ft./sec. Maximum energy: 310 ft./lbs. Shots at optimal velocity*: 10 Combination 11mm dovetail and Picatinny optics rail 250 BAR (3625 PSI) fill pressure Barrel length: 20" Overall length: 36" Weight: 9.5 lbs. Elevation and angle adjustable butt pad Elevation adjustable locking cheek piece Storage clips for 2 arrows on barrel cover Detachable flip-up Tru-Glo fiber optic sights Tactical all-weather synthetic stock with pistol grip * - Shots within 85% of peak velocity