Primary Airsoft HPA to M4 Magazine Adapter for Gas Blowback Airsoft Pistols w/ Magazine (Model: KWA MP7 / Straight)

Primary Airsoft HPA to M4 Magazine Adapter for KWA MP7 GBB (Straight Model)

Take your airsoft game to the next level with the Primary Airsoft HPA to M4 Magazine Adapter for KWA MP7 Gas Blowback SMGs. Designed specifically for competitive players who prefer gas blowback platforms but don’t want to be at a disadvantage against AEG users, this adapter bridges the gap between realism and performance. Whether you’re running your KWA MP7 as a primary or looking for longer sustained fire without constant reloads, this adapter is the upgrade you’ve been waiting for.

Crafted with a lightweight yet durable glass-reinforced nylon polymer body and a CNC aluminum magazine release, this adapter is built to last. The design is robust enough for serious use on the field while maintaining a lightweight profile that won’t bog you down. It’s engineered with precision, ensuring smooth operation and compatibility with most standard M4 AEG magazines.

This model comes pre-installed with a Foster-style 1/8 NPT quick disconnect fitting, making it HPA-ready right out of the box. You’ll only need a compatible paintball tank with a low-pressure regulator (0–140 PSI), an HPA line with a Foster quick disconnect, and your preferred M4 magazine to start dominating the field.

One of the key features is the universal feed tube, which ensures consistent BB feeding from your M4 mags directly into your MP7 without jamming or misfeeds. Included with the adapter is a longer 2.5mm hex head screw, ensuring a secure and solid fit into your MP7 without additional modification.

This straight model is specifically compatible with the KWA MP7 GBB, giving players an edge by drastically increasing magazine capacity and operational consistency — especially in colder weather where gas efficiency can suffer. By switching to HPA and AEG magazines, you gain greater control, better consistency in FPS, and the ability to stay in the fight longer between reloads.

Key Features:

• Lightweight glass-reinforced nylon polymer construction

• CNC-machined aluminum magazine release for added durability

• Allows the use of HPA systems and M4 AEG magazines on your KWA MP7

• Comes pre-equipped with a Foster 1/8 NPT quick disconnect fitting

• Includes universal feed tube and longer screw for easy installation

• Compatible with most M4 AEG mid-cap and high-cap magazines

• Built to withstand operating pressures of up to 140 PSI (recommended ~120 PSI for longevity)

Specifications:

• Compatibility: KWA MP7 Gas Blowback Airsoft SMG

• Magazine Compatibility: Accepts most M4 AEG magazines

• Materials: Glass-Reinforced Nylon, CNC Aluminum

• Fitting: Foster Pneumatics 1/8 NPT quick disconnect

Important Notes:

• Always ensure you’re using a regulated low-pressure HPA system (0–140 PSI max).

• Exceeding pressure limits can damage your airsoft gun’s internal components.

• This adapter is not compatible with VFC MP7s or other gas blowback models not specified.

• Gun, M4 magazines, and HPA tank/hose are not included.

About Primary Airsoft:
Founded by airsoft innovator Bryan Levesque, Primary Airsoft continues to honor his legacy by producing performance-driven airsoft accessories that improve the gameplay experience. Their products are trusted by serious players looking for reliability, consistency, and innovation on the field.

If you’re serious about maximizing your gas blowback experience without sacrificing capacity or consistency, the Primary Airsoft HPA to M4 Adapter is a must-have addition to your MP7 loadout.