Crosman 1911BB .177 Semi-Auto CO2 Pistol: * Under the barrel rail system * Stock material: synthetic * Mechanism: semi-auto repeater * Power source: CO2 * BB clip capacity: 20 * BB velocity: 480fp * Caliber: .177 caliber * Ammo type: .177cal BB only * Safety: bolt * Weight: 0.88lbs * Length: 4.25" * Barrel: smooth steel * Model# 40001