Full metal construction provides a realistic weight and balance of the P229 firearm; Capable of firing either .177 cal (4.5mm) lead pellets or steel BBs; Strong blowback system provides solid recoil impulse for added realism; Compatible with SIG AIR reflex sight (sold separately); M14x1 CCW threaded muzzle with knurled thread protector; Functional decocker/safety lever; Patented cam-lever CO2 loading system allows for toolless cartridge changes