GLK/AAP-01 Angled HPA Adapter

The HPA adapter for GLK / AAP-01 to M4 magazines is a practical solution for players who want to convert their GLK or AAP-01 platform to HPA and use AEG M4 magazines instead of standard pistol magazines. The result is higher ammunition capacity, easier reloads, and more effective use of the pistol in dynamic play, CQB, and speedsoft.

The adapter is designed to be used with a compatible donor gas magazine and, depending on the selected version, is available in either a standard straight configuration or an angled 70° version. The 70° design runs the magazine more parallel to the wrist, reducing the overall vertical profile of the setup. This is especially useful for players who want the most compact build possible for a more aggressive playstyle.

The construction is made from highly durable polymer materials designed for long service life and repeated use. The adapter uses a single stack feed design for more reliable operation and is compatible with most airsoft M4 magazines. The manufacturer especially recommends EPM1 / EPM1s magazines or other models with strong springs. Another practical benefit is BB retention, meaning that typically only 2–3 BBs are lost during magazine changes.

The adapter is compatible with most GLK 17 style magazines, including WE, Action Army AAP-01, Novritsch SSP18 / SSP28, Raven R17, Vorsk, and Tokyo Marui magazines (if they use a screw rather than pins). For some setups such as VFC GLKs, a compatible WE magazine can be used as the base.

The adapter comes as standard with a US Foster fitting, which is the most common airsoft HPA connection type. An EU fitting can be purchased separately. Because some adapters have a smaller internal volume than standard gas magazines, the recommended operating pressure is approximately 90–150 PSI, and 150 PSI must not be exceeded.

For correct and safe operation, always use air regulated by a secondary regulator. The adapter must never be connected directly to paintball tanks, CO2 tanks, or Tippmann-style HPA lines. During installation, it is recommended to insert the adapter with the bolt / slide locked back to reduce pressure on the nozzle loading arm.

Key features:

• HPA adapter for GLK / AAP-01 to M4 magazines
• compatible with most AEG M4 magazines
• single stack design for reliable feeding
• low-profile solution for HPA pistol conversio
• BB retention during magazine changes
• US Foster fitting as standard
• recommended pressure: 90–150 PSI
• maximum 150 PSI