Hi Capa HPA/M4 Magazine Adapter ●Stable operation unaffected by temperature fluctuations! ●Increased magazine capacity using M4 magazines! ●A great option for those that want to play on the offence! “NINE BALL Hi Capa HPA/M4 Magazine Adapter” will allow you to use HPA (High-Pressure Air) and Tokyo Marui spec M4 AEG magazines with Hi-Capa Gas Blowback series pistols. HPA ensures stable performance and eliminates inconsistencies which can often be affected by changing temperatures or gas pressures, making your airsoft pistol more reliable. Additionally, using M4 magazines significantly boosts the ammunition capacity beyond what's possible with regular pistols, even when using “extended magazines”. This adapter is ideal for the player that enjoys offensive play styles, who wants to engage swiftly and aggressively with their lightweight airsoft pistols. ※To use this product, you need an M4 AEG magazine, a "paintball" tank with a low-pressure regulator (0-140 psi), and a hose with a Foster (polarstar) quick disconnect. ※The normal operating pressure of green gas is about 120 psi, depending on the temperature. Please avoid exceeding 140 psi in this pressure range, as higher pressure may cause excessive wear or damage to the airsoft gun internals. ※Please note that depending on the shape of the M4 magazine used, there may be issues with inserting or feeding in the magazine adapter. ■Compatibility: Tokyo Marui Gas Blowback Pistol ・Hi-Capa Series