Crosman C31 Air Pistol * Weaver rail system * Stock material: synthetic * Clip has an easy locking spring * BB clip hold 18 rounds (clip model is 0481) * Holster offers quick release buckle * Power source: CO2 * Mechanism: Semi-auto repeater * Caliber: .177 caliber * Ammo type: shoots .177cal only * BB clip capacity: 18 * BB velocity: 495fps * Barrel: smooth bore * Safety: bolt * Weight: 1.50 lbs. * Length: 8.5" * Model #C31