Choosing HPA Adapters for Popular Gas Pistols
Question:
I want to convert my gas blowback pistol to HPA for better consistency and cold-weather performance. Which Primary Airsoft adapters support the most common platforms like the Hi-Capa, Glock/AAP-01, MK23, and 1911?
Answer:
Primary Airsoft offers dedicated HPA adapters for all of those platforms, plus several others. The lineup covers Tokyo Marui and compatible Hi-Capa/1911 frames, Glock-pattern pistols (including the Action Army AAP-01), the Tokyo Marui MK23/SSX23 and Novritsch SSQ22, the Beretta M9, CZ P-09 and CZ SP-01 Shadow 2, and KWA KMP9/MP7 SMGs. Adapters are also available for the SMC9/GTP9 and the KJW KC02. Each adapter replaces the magazine’s gas reservoir and routes air through the magazine body, preserving the gun’s original blowback function and hop-up design.
Question:
Do these adapters require permanent modification to the magazine?
Answer:
No. Installation is non-destructive. You remove the magazine’s base plate, valve, and internal gas components, then insert the adapter’s feed tube and seat the new base plate. The original parts can be reinstalled later if you want to return to green gas. Primary Airsoft sells spare M4 magazine releases, feed tubes, O-rings, and screws so you can maintain or repair the adapter over time.
Question:
What air source and regulator do I need?
Answer:
You need a standard HPA tank (3000 or 4500 psi) with a regulated line outputting 80–120 psi for pistols and 100–140 psi for SMGs like the KMP9 or MP7. A pistol regulator with a quick-disconnect fitting is typical. The green gas nozzles Primary Airsoft sells (bottle and hose styles) are for filling green gas magazines, not for running HPA.
Question:
How does the KC02 adapter differ from the pistol models?
Answer:
The KC02 adapter is unique because it feeds from M4, MP5, or X9 magazines instead of the pistol’s native magazine. This turns the KC02 into a high-capacity HPA carbine ideal for CQB or backup use. The M870 M4 magazine adapter works on the same principle, letting a gas shotgun run from standard AEG M4 mid-caps.
Question:
Where can I see the full compatibility list and purchase adapters?
Answer:
Visit https://primaryairsoft.us/ for the complete catalog of HPA adapters, magwells, green gas nozzles, and spare parts.
Running an HPA or mag-fed setup?
Primary Airsoft makes HPA adapters for Hi-Capa, Glock/AAP-01, MK23/SSX23, SSQ22, 1911, Beretta M9, CZ P09, CZ SP-01, KWA KMP9, KWA MP7, SMC9/GTP9 and more — feeding M4, MP5 or X9 magazines — plus magwells, green gas nozzles and adapter spares. Shop them at primaryairsoft.us.