Airsoft Master Gunsmith Gen 2 High Output Valve for Gas Blowback Airsoft Pistols
(Model: VFC HK45CT)

"these valves work really well in my tm glock 17

"Tried this in an AAP01. There is no return spring in this, at the end of the second load up , It passes all the gas out the magazine . These guys at Evike returned my money in full extra fast, so I bought a co2 magazine instead. So far so good. More power and real fun. We’ll so how long it lasts! ( I don’t have an airsoft chrono but it puts quite a dent in my wood backstop, though not as deep as my Elite force 1911 co2.)