Double Male Threaded-Adapter Coupling G1/2 and M16*P1.5 12g CO2 Adapter With CO2 88g Bottle Threads for Airsoft Rifle Paintball
https://www.vogueparade.com/shopping/EN/100005571/1/1005002560852681/double-male-threaded-adapter-coupling-g12-and-m16p15-12g-co2-adapter-with-co2-88g-bottle-threads-for-airsoft-rifle-paintball//