Description
Primary Airsoft SMC9 GTP9 HPA M4 Adaptor GTP-9
Primary Airsoft SMC9 GTP9 HPA M4 Adaptor GTP-9
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The “SMC9 / GTP9 HPA-M4 Adaptor (GTP-9)” is an aftermarket adapter designed to convert a GBB or GBB-R pistol (specifically the G&G GTP9 or G&G SMC9) so that it can be powered by HPA (high-pressure air) and accept standard AEG magazines — typically M4 / AR-style AEG mags — instead of the pistol’s standard gas magazine.
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The adapter is made from laser-sintered nylon (light but durable), offering a custom solution to expand your pistol’s capabilities.
What it Requires / How It Works
Using the adapter involves more than just swapping magazines — you need:
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An M4-style AEG magazine.
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A HPA tank (with a suitable low-pressure regulator), a hose with a Foster (or equivalent) quick-disconnect fitting, and BBs.
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The adapter itself (comes pre-installed with a GTP9 magazine) — you remove the pistol’s normal gas magazine and insert the adapter + AEG magazine + connect the HPA line.
Important: typical operating pressure for such a conversion is around 120 psi (similar to “green gas” pressure).
Intended Use / Why People Install It
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The main advantage of using this adaptor is to transform a pistol (GTP9/SMC9) from gas-blowback use into an HPA-powered platform — which tends to give more consistent performance (regardless of ambient temperature or gas issues) and often more reliability.
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It also enables use of standard AEG magazines — meaning you suddenly have access to higher-capacity mags (M4 style) rather than limited-capacity pistol magazines — making the pistol viable as a “primary” or high-capacity weapon rather than just a sidearm.
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For players running fast-paced games, close-quarters, or who like HPA consistency, this adapter levels the playing field when using a typically pistol-class gun vs. AEG-class guns, especially in engagements where mag capacity & reliability matter.
What to Keep in Mind / Limitations & Requirements
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You must have an HPA setup (tank + regulator + hose + quick-disconnect) — the adapter alone does nothing.
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Magazine compatibility: You need a compatible M4-style AEG magazine. Not all mags might feed reliably — it depends on the magazine type & spring strength. We reccomend the use of PTS EPM magazines.
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Air pressure limits: As noted — recommended ~120 psi, max ~140 psi; higher pressure risks damaging the pistol internals.
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Not a “plug-and-play” pistol anymore: Installing HPA & the adapter changes the way the gun is powered and maintained. You trade gas-mag convenience for HPA + external tank logistics. Always remember to keep the gun well lubricated.
This adapter is ideal for you if:
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You own a GTP9 or SMC9 and want a high-capacity, HPA-powered weapon without buying a full AEG or HPA-ready replica.
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You like using standard AEG mags (M4 / AR-style) for greater ammo capacity and easier reloads.
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You’re fine with carrying an HPA tank/line and want consistent performance regardless of temperature or gas-mag variability.