Ignite Black Ops Tactical M4 Viper Professional Grade Air Soft Rifle: * Full metal gear box for increased performance and durability * 360-420 FPS (.20g vs .12g BBs) * 600 RPM * Semi and fully automatic shooting modes * Adjustable hop-up for increased distance and accuracy * Electric blow back simulates authentic firing recoil * High capacity, 300-round metal magazine * Rechargeable 8.4V NI-MH 800 mAh battery pack and charger * 14" 6.08mm metal barrel for increased accuracy * Removable handle with fully functional elevation and windage knobs * TG pistol grip with advanced trigger guard * 4-position, adjustable sliding stock * Weight: 4.12 lbs * Length: 33.5" * Electric Airsoft Rifle Model# 3501 * Age Range: 18 and up