Crosman Ripcord M4 Airsoft Gun Tan GFM4NFB. 243 Caliber Features of Crosman Ripcord M4 Airsoft Gun .12G BB VELOCITY Up to 425 fps .20G BB VELOCITY Up to 390 fps CALIBER 6.0 mm LENGTH 32.00 in BARREL MATERIAL Nylon Fiber BATTERY LIFE 4 BATTERY TYPE 8.4...