Gas Power M190 Military Pistol Soft Air pistol with power! Shoots standard 6mm plastic pellets at 350fps, but powered by compress 'Green Gas' that acts like CO2 but shoots with more force. Full size, heavy weight very realistic handgun fires double or single action, working safety, accessory rail, even disassembly is just like the real gun. Fill with gas and fire 24 rounds as fast as you pull the trigger, hold the trigger down and it goes FULL AUTO. Fire about 75 rounds per gas refill. Blow back action that feels just like the real gun, even locks open after the last round is fired, adult fun. To load the gas; Remove the magazine and insert the gas tip down and the bottom of the magazine up and hold the magazine against the gas can for about 15 seconds to fully load the gas into the magazine. If the gun or magazine becomes too cold, the velocity and number of rounds fire are both reduced. To avoid this fire short burst and warm the magazine up with your hands during extend firing. Our test show you will get about 75 rounds out of one gas charge. Since the magazine holds 24 rounds, it makes sense to load the gas every third clip. The gas has an odor, so you will want to load and fire the weapon outdoor only. It will cycle the even when not loaded for a stunning blank firing display. see below for gas: Use SOFT-899 adaptor so you can use one pound propane tanks to fill the pistol. Same as green gas but cheaper.