HPA Adapter Saiga 12 High Volume to M4

A high-volume HPA adapter that converts compatible Tokyo Marui Saiga-12K and Saiga SBS gas shotguns to use an external HPA system with Airsoft M4 AEG magazines.

Product Features:

• Compatible with Tokyo Marui Saiga-12K and Saiga SBS gas shotguns.
• Compatible with most Airsoft M4 AEG magazines.
• One-piece adapter construction.
• Higher internal air volume than previous designs.
• Plug and play design with AIRTAC valve, injection moulded NBR gas router and gas router plate pre-installed.
• No donor magazine parts or assembly required.
• Impact resistant polymer construction.
• Integrated BB retention system minimises BB loss during magazine changes.
• US Foster HPA quick disconnect fitting supplied as standard.
• Designed to operate from approximately 80 PSI.
• Recommended operating pressure: 90-150 PSI.
• Maximum operating pressure: 150 PSI.

The AIRTAC Saiga 12 High Volume to M4 HPA Adapter is designed to convert compatible Tokyo Marui Saiga-12K and Saiga SBS gas shotguns to operate from an external High Pressure Air system while feeding from Airsoft M4 AEG magazines. Its one-piece construction closely follows the profile of the original shotgun while providing a clean and durable HPA conversion.

Unlike earlier designs, the latest high-volume adapter combines the upper gas section and M4 magwell into a single-piece body, increasing the available internal air volume. This allows reliable operation from approximately 80 PSI while maintaining consistent gas delivery throughout the firing cycle. The adapter is supplied fully assembled with an AIRTAC valve, injection moulded NBR gas router and gas router plate already installed, allowing installation straight from the box without transferring donor magazine components.

Manufactured from impact resistant polymer, the adapter is compatible with most Airsoft M4 AEG magazines. For optimum feeding performance, PTS EPM1 and EPM1S magazines are recommended by the manufacturer. An integrated BB retention system helps minimise ammunition loss during magazine changes, while the supplied US Foster fitting provides compatibility with standard Airsoft HPA airline systems.

Designed for use with regulated HPA systems, the adapter operates most effectively between 90 and 150 PSI, with a maximum recommended operating pressure of 150 PSI.

Range Overview:

AirTac’s HPA Adapters range converts traditional gas-powered replicas to use high-pressure air magazine systems with seamless reliability. Designed for multiple replica platforms, each adapter features precision-moulded construction, a secure BB-retention system, and standardised US-thread fittings for broad compatibility. The range combines rugged strength with practical installation, giving players smoother reloads and extended playtime through improved air efficiency and modular flexibility.

• Injection-moulded polymer housings provide durability and consistent alignment
• Standard US-thread fittings ensure cross-system HPA compatibility
• Integrated BB-retention systems prevent feed loss during reloads
• Supplied with magwell inserts, screws and shim sets for precise fitment
• Available for multiple pistol and SMG platforms for modular loadouts
• Engineered for reliability, consistency and long-term performance

Brand Statement:

AirTac specialise in developing high-performance HPA conversion systems for airsoft enthusiasts seeking consistent, efficient, and adaptable performance. Their focus on precision engineering and robust construction ensures every product delivers dependable field use, intuitive function, and lasting value.

Safety Information:

Do not exceed 150 PSI when operating any airsoft HPA adapter Always use air regulated by a secondary regulator Check PSI output before connecting air to the adapter Do not connect directly to unregulated air sources, CO2 systems, or high-pressure tanks Do not use with incompatible high-pressure air lines or fittings Always ensure correct setup and operation before use