Compact and punchy over short distances, if you want the most bang for your buck at close quarters, there's no better option than a gas gel blaster pistol. 

 GBB Pistols use CO2 gas or green gas to fire gel balls out of their barrels, and are made from high-quality materials such as polymer and CNC. They’ve got a higher performance rate than manual or electric pistols, and are particularly known for their power, realism and accuracy.