Guns Modify High Efficiency Hard Piston Head for Tokyo Marui M&P / USP GBB Series

The Guns Modify High Efficiency Piston Head for the Tokyo Marui M&P and USP pistols is a high quality upgrade over the stock part found in the out of the box gun. Compatibility: Tokyo Marui M&P GBB Pistol Series Tokyo Marui USP GBB Pistol Series