MWS HPA Adaptor for M4 AEG Magazines - Black

Want more BBs, less reloading and the consistency of an HPA system, but still love your GBBR MWS Tokyo Marui–type replica?

The Army Armament HPA adapter magazine for M4 AEG / MWS GBBR is the link between both worlds.

This adapter lets you use standard M4 AEG magazines (both Mid-Cap and Hi-Cap) in your MWS GBBR-type replica. That means much higher ammo capacity, easier magazine handling, and a smoother transition if you also run an M4 AEG setup.

The upper part of the adapter is made from a durable aluminum alloy, while the magwell is CNC-machined from 6061 aluminum, giving you strength, precision, and long service life. On the side you’ll find a viewing window so you can quickly check whether the magazine is properly seated.

The adapter is fully adjustable – with the adjustment screw at the rear of the magwell, you can fine-tune the fit for most M4 AEG Mid-Cap and Hi-Cap magazines available on the market. No need to worry if your favorite brand will fit.

For maximum HPA compatibility, the package includes two HPA valves – one built to EU standard and one to US standard, plus a seal kit to ensure reliable, leak-free operation. The gas path is designed at 70° (“Gas routed 70°”), matching the manufacturer’s concept and helping with hose routing in your HPA setup.

Key Features

• Compatible with MWS GBBR Tokyo Marui–type replicas
  Designed for GBBR MWS Tokyo Marui–type platforms, while feeding them via M4 AEG magazines.

• Uses M4 AEG magazines (Mid-Cap & Hi-Cap)
  Supports standard M4 AEG Mid-Cap and Hi-Cap magazines – more BBs, fewer reloads.

• Durable CNC aluminum construction
  Upper body from aluminum alloy, magwell from CNC 6061 aluminum for strength and precision.

• Gas routed at 70°
  “Gas routed 70°” design to match the intended HPA gas flow layout.

• Developed with SP System
  Built in partnership with SP System, focused on performance in real game conditions.

• Two HPA valves included (EU & US)
  1× EU HPA valve and 1× US HPA valve included for use with different HPA standards.

• Seal kit included
  Set of seals for reliable, airtight operation and easy maintenance.

• Side inspection window
  Observation window to visually confirm proper magazine insertion.

• Adjustable magwell fit
  Adjusting screw at the rear of the magwell lets you tune fit to various M4 AEG magazines on the market.

Package Contents

• 1× HPA adapter magazine for M4 AEG / MWS GBBR – Army Armament

• 1× EU HPA valve

• 1× US HPA valve

• 1× Seal kit

Basic Specifications

• Category: HPA accessories

• Brand: Army Armament

• Model: EU and US adapter

• Color: Black

• Compatibility: GBBR MWS Tokyo Marui–type replicas / M4 AEG magazines

• Weight: 310 g

• Material: CNC aluminum