Photo of AIRTAC KWA/ASG MAC11 Modular HPA Adapters. A MAC11 is in the background with three adapters in front. The adapters have MP5, M4 and drum bases.
Photo of AIRTAC KWA/ASG MAC11 Modular HPA Adapter with a Shotgun Shell base
Photo of AIRTAC KWA/ASG MAC11 Modular HPA Adapter with an M4 base
Photo of AIRTAC KWA/ASG MAC11 Modular HPA Adapter with an MP5 base
Photo of AIRTAC KWA/ASG MAC11 Modular HPA Adapter with a drum base

KWA/ASG MAC11 Modular HPA Adapter - PLUG AND PLAY

£99.98

Free Lifetime Warranty against manufacturing defects and accidental damage. Tap to learn more
Airtac Flat Top Modular Adapter Base (Style):

Airtac Flat Top Modular Adapter Base (Style)
Quantity:
In stock

This HPA adapter represents the culmination of months of work to produce, from scratch, a shortened magazine for the GBB MAC11. This leads to an ultra lightweight magazine setup, that is both more enjoyable and economical than buying the gas mags.

There are a number of factors involved when designing a HPA adapter for this gun. We’ve taken the time to address these, ensuring flawless feeding, lifelong air-seal, and an excellent aesthetic.

PLUG AND PLAY - We've injection moulded our own gas router for this adapter, and combined it with our high flow valve and printed feed lips. This means no more donor mags!

MODULAR ADAPTER TOP

This is the 'top' part of the modular HPA adapter, and is available for purchase so you can use your existing modular bases, saving you money!

M4 

Compatible with most M4 magazines, works best with PTS EPM1. A CNC Magazine release and feed tube set this adapter apart from others on the market!

You can also choose from a variety of coloured magazine catches here.

Your adapter will come with a number of shims that can be used to ensure snug fitment of your M4 magazine.

MP5

Compatible with all CYMA MP5 Mid Cap Magazines. A CNC Magazine release and feed tube set this adapter apart from others on the market!

SHOTGUN SHELL 

Compatible with CYMA Shotgun Shells and some other brands. A BB release inside the adapter prevents any BBs from being dropped when releasing an empty shell.

DRUM BASE

Allows your HPA adapter to be used with a Tokyo Marui MP5 or VZ61 drum (or a Well/Jing Gong one if you can find them). The drum itself can be purchased separately here

MODULAR MAG-WELLS ALSO SOLD SEPERATELY!

Modular Mag-wells can be purchased individually here. I recommend mixing one high capacity mag-well, e.g. M4 or MP5 with a limited capacity mag-well such as the shotgun shell base, for those sites who don't like HPA adapters, or for when you want a more 'realistic' setup, while still running HPA.

DO NOT EXCEED 150PSI WITH ANY AIRSOFT HPA ADAPTER.
ALWAYS USE AIR REGULATED BY A SECONDARY REGULATOR (EG AT200, WOLVERINE STORM, POLARSTAR MRS).
CHECK YOUR PSI BEFORE CONNECTING AIR TO A HPA ADAPTER.
NEVER CONNECT OUR EQUIPMENT TO PAINTBALL AIR TANKS OR CO2 TANKS.
NEVER CONNECT OUR EQUIPMENT TO A TIPPMAN STYLE HPA LINE

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.
We test every HPA adapter we sell
  • 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.
  • 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
DO NOT EXCEED 150PSI WITH ANY AIRSOFT HPA ADAPTER. ALWAYS USE AIR REGULATED BY A SECONDARY REGULATOR (EG AT200, WOLVERINE STORM, POLARSTAR MRS). CHECK YOUR PSI BEFORE CONNECTING AIR TO A HPA ADAPTER. NEVER CONNECT OUR EQUIPMENT TO PAINTBALL AIR TANKS OR CO2 TANKS. NEVER CONNECT OUR EQUIPMENT TO A TIPPMAN STYLE HPA LINE