VFC M4 to MP5 HPA Adapter - Black

The HPA adapter for VFC M4 to MP5 magazines is designed for players who want to run their VFC M4 GBB replica on HPA while using compact MP5 magazines. The adapter comes ready to use straight out of the box — it is pre-fitted with the valve, feed lips, and gas router, so no donor magazine or extra assembly is required.

A major advantage is its low-profile design, with the magwell sitting hidden inside the rifle’s magwell for a cleaner and more discreet look. The construction is designed for solid fitment and reliable operation, and each unit is tested by the manufacturer in a VFC M4 before shipping.

The adapter uses a high-flow valve, helping provide reliable function, strong performance, and support for sustained fire or higher rates of fire. It also includes a BB stopper, which reduces BB loss when removing the magazine — typically only 2 BBs are dropped during a mag change.

To improve compatibility with different receiver and magazine tolerances, the package includes a rear shim for better air seal and side shims to fine-tune MP5 magazine fitment width. If a CYMA MP5 magazine seems too wide, one of the side wings can be removed using a 1.5 mm hex key. If a straight MP5 magazine has too much vertical play or poor feeding, an internal fitment block can be installed for better support.

The adapter is compatible with all CYMA MP5 Mid-Cap magazines, including:

• 65-round metal
• 120/130-round metal
• straight
• Novritsch straight
• bullet window

It comes standard with a US Foster fitting, the most common HPA fitting in airsoft. An EU fitting can be purchased separately. Recommended operating pressure is approximately 90–150 PSI, and 150 PSI must not be exceeded.

Key features:

• HPA adapter for VFC M4 to MP5 magazines
• plug-and-play solution with no donor parts required
• pre-fitted with valve, feed lips, and gas router
• compact low-profile design
• tested in a VFC M4
• high-flow valve
• BB stopper to reduce BB loss
• compatible with CYMA MP5 Mid-Cap magazines
• includes rear shim, side shims, spare feed lips, and mounting screws
• US Foster fitting as standard
• recommended pressure 90–150 PSI
• maximum 150 PSI