Brand new semi automatic M4 R1 Co2 BB air rifle by CROSMAN comes with R.I.S. quad tactical Picatinny rail sytem, polymer flip-ups and a 6 position collapsible butt stock. The fully detachable magazine comprises both a 25 BBs feeding tube and 2 (TWO) Co2 capsules. This rifle features a genuine feel, familiar controls, all at a jaw-dropping rate of up to 430 fps. What's more, we increase power (by about 15% - 20%), by re-machining some of its air VALVE PARTS to allow more air preasure into the barrel. A spare magazine with increased energy of appx 4 Joules (appx 500 fps) is currently available as a supplement when purchased with a rifle

• Tactical, semi-auto BB air rifle
• Fueled by two 12-gram CO2 cartridges and delivers velocities of up to 500 fps
• 25-rounds drop out magazine, compatible with traditional 4.5mm steel BBs
• Adjustable stock and AR compatible buffer tube and pistol grip
• Quad RIS accessory rail
• Realistic weight, action and functions, great for skill development, training and fun