COWCOW Technology Enhanced Piston Head for Tokyo Marui G19, M&P9, M&P9 V-Custom GBB Pistol

COWCOW Technology Enhanced Piston Head for Tokyo Marui G19, M&P9, M&P9 V-Custom GBB Pistol Enhanced Piston Head for Air-Tightness. Designed to withstand high impact pressure. Stabilized Performance. Improved durability over TM piston headDrop-in upgrade part For TM original BBU For TM G19, M&P9, M&P9 V-Custom Series Airsoft Gas Blow Back GBB Pistol