GHK G5 / M4 HPA Adapter (MODULAR) - PLUG AND PLAY
Airtac 'Flat Top' Modular Adapter Base (Style)
T1P Dead Drop Grip Compatible Run your HPA line seamlessly from your adapter into your rifle's grip Click to learn more
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Airtac 'Flat Top' Modular Adapter Base (Style)
T1P Dead Drop Grip Compatible Run your HPA line seamlessly from your adapter into your rifle's grip Click to learn more
Airtac 'Flat Top' Modular Adapter Base (Style)
T1P Dead Drop Grip Compatible Run your HPA line seamlessly from your adapter into your rifle's grip Click to learn more
This adapter allows you to run HPA on your GHK G5 or M4 variant
Comes pre-fitted with valve, feed lips and gas router - you do not need to use any donor parts. No assembly is required.
The magazine catch area of this adapter is adjustable, and comes with three shims allowing you to adjust nozzle to gas router seal. We test each adapter in a GHK G5 before shipping, and prefit the shim that provides us the best performance.
The gas router for this adapter is made from injection moulded rubber, to the standard GHK spec and dimensions, meaning you can use a factory or aftermarket GHK M4/G5 router should you wish.
We utilise a non GHK valve due to their flawed valve seal design. This has allowed us to build a far more reliable adapter that is capable of high FPS and sustained full auto.
Many customers buy this adapter by mistake, thinking it is for Golden Eagle M4s. Please ensure your magazines gas router is flat and not angled upwards towards the feedlips. If it angles upwards towards the feedlips, it is likely a Golden Eagle magazine / gun (see image below)
Includes one set of spare feed lips, and magazine catch shims labelled 1 to 3, along with all screws required to fit any of our modular magwell bases.
US Style HPA Fitting as Standard (most common fitting across industry - compatible with all AIRTAC HPA equipment)
*Drum mag not included with drum base. You can purchase drum here.
AIRTAC Adapters
Each of our adapters is designed to be low profile while reaching field limit FPS. We design and manufacture all of our products to the highest standard, and do not charge extra for ‘premium’ features. Where applicable this adapter features:- Lifetime Warranty (Our adapters have to be built to last)
- Injection moulded or CNC magwell that is impervious to BB strikes at point blank skirmish FPS.
- CNC or Injection moulded Feed Tubes and Magazine Catches for lifelong durability.
- Tuneability/compatability via integrated shim systems. Our adapters are designed to cope with 'airsoft tolerances'
- Gas Routers injection moulded from NBR, 1:1 with the factory gas router.
- Seal Test
- Firing test, for feed and recoil (we have over 100 guns on site for testing)
Plug and Play
This adapter is ready to go out of the box. Valve, feed lips, and gas router are already fitted to the adapter. You do not need to use any donor parts.No assembly is required.
Compact MP5
Key Information
- We use a US Foster Fitting as standard. This is the most common airsoft HPA fitting. EU fittings can be purchased separately.
- Some of our HPA adapters have a smaller internal volume than gas magazines. Because of this, you will need to use a PSI of 90–150.
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If you need higher FPS, you can:
- Fit a tighter barrel
- Use a longer barrel
- Use heavier BBs
- Fit an improved hop bucking
- If your replica has an NPAS fitted, we advise opening it fully.
- Do not exceed 150 PSI. Many airsoft guns will not see an increase in FPS past this, as the hammer may struggle to depress the valve correctly.
- Insert the HPA adapter with your bolt / slide locked back to minimise pressure against the nozzle loading arm.
Run different mags with your adapter!
This adapter is also compatible with the following modular magwells. Its a great way to change up your playstyle and aesthetic!| Magazine Type | Compatibility | Magwell |
|---|---|---|
| M4 | ✅ | View |
| M4 (Angled) | ❌ | View |
| MP5 | ✅ | View |
| Shotshell (Pistol Style) | ✅ | View |
| Shotshell (Rifle Style) | ✅ | View |
| Remote Feed | ❌ | View |
| Compact Drum | ✅ | View |