The SOCOM Gear Kel-Tec PLR-16 gas gun uses green gas in its magazines. BBs load into the side, via the included loader. The recoil and kick on this gun in the heaviest we've ever shot! Seriously, it's a beast of a gun, albeit in such a small design. Uses SOCOM Gear / WE Tech M4 style spare gas magazines. Front rails allow for mounting of accessories and a scope.