It fires 4.5-mm steel BBs and the blowback gives you a powerful recoil. The all-in-one magazine accommodates the cartridge plus 18 steel BBs.

 

Caliber 4,5 mm (.177) BB
Magazine capacity 18 shot(s)
Velocity 105 m/s
Energy < 2.0 Joule(s)
Length 190 mm
Weight 660 g