This CO2-powered M9A1, from KJ Works, is an all-metal gun. There are no markings or trademarks on the slide, but the gun still looks great and at a fraction under 1kg, it's a weighty gun too!
Luckily the length of the mag hasn't been increased greatly, with only a bumper that gives any indication that it can hold a CO2 canister within. The CO2 gives this gun some kick, with a solid blowback. Power is a decent 350fps, using .2g BBs. Another point worthy of note is that the loading nozzle inside is a reinforced one.