The Win Gun CO2 pistol features sliding handle panel to conceal the CO2 locking base, functional safety, heavy weight inserts and high power. The highly efficient CO2 system can fire over 100 BB's on one CO2 cartridge. Don't be fooled by it's price, this pistol shoots whopping close to 500 FPS with 0.20g bb! For those looking for an affordable high power non-blowback, this handgun does it all with a awesome 400+ FPS for a very small price tag! Dimension: 8.5" Long x 5.25" Tall Weight: 539g Gas: 12 gram CO2 cartridges. Size / BB: 6mm Airsoft bb. 0.25g or heavier / Matrix & Compatible high grade bbs recommended for best performance, accuracy and range. Mode: Semi-Automatic / Safety Action: Non-Blowback / Semi-Automatic. Hopup: Yes. Muzzle Velocity: 370~499 FPS. Measured with 0.20g bb. Package Includes: Gas Airsoft Pistol, Mag, Manual Mag Capacity: 15 +/- Rounds. Disclaimer: This hand gun fires over 400 FPS and may not be applicable for fields with FPS limit under 400 FPS