Tactical Game Innovation Launcher Device Shell for GP-30 / M
One thing you'll notice is that there is rifling inside the cartridge. This will help spin the grenade while on its trajectory allowing it the ability to reach further. It is gas operated, so you can use red gas if you wish, but you'll need to cool down the cartridge first before use. Just charge the cartridge at the bottom, and then press the button. This will expel all gas and cool it down at the same time. If you do not do this, the grenade will explode while in the chamber.