MR711. Airsoft Spring M4A1 Carbine Elite Rifle This is the new and improved M4A1 Carbine assault rifle with a adjustable stock. The spring is so strong, it shoots at over 280 FPS. Raw power and super accuracy combined makes this rifle a must buy. Customers are loving this one. Price: 1 to 5     $ 13.00 each 6 or more     $ 11.00 each Unit: each Quantity: