Spyder MR4 Pro Mil Sim Paintball Marker, .68-Caliber EKO Valve System capable of 1,600 shots from a 20oz CO2 Tank, reduces the recoil for smooth firing; Military look including multiple Picatinny Rails Effective Range: Approximately 200 feet, Accuracy Range: Up to 150 feet, Air Efficiency: Shoot up to 1,600 paintballs per 20oz CO2 Tank Adjustable Car Stock,12" Micro Ported Barrel w/ Muzzle Break Side Cocking Alum. Bolt, Quick Release Striker Plug Pull Pin, Short Pull Single Trigger, External Velocity Adjuster Military Simulated Paintball Marker