CNC Machined Aluminum Hopup Chamber – Maxx Pro Version

Precision-engineered for ultimate performance, the CNC Aluminum Hopup Chamber M4P Pro redefines accuracy in airsoft with its advanced BB Latching System and seamless compatibility with HPA PolarStar Engines. Designed specifically for M4/M16 platforms, this chamber combines precision machining with ergonomic features to deliver consistent shots every time. Its aluminum Rotary Dial Knob offers precise hop adjustment, while interchangeable 4mm/6mm Bucking Nubs ensure optimal performance with R-Hop or standard hop setups—perfect for fine-tuning your game on any field.

The M4P Pro’s interchangeable Inlet Adaptor (OD11mm standard, OD11.5mm/OD12mm optional) ensures flawless alignment with HPA nozzle outlets, eliminating wobble and maintaining FPS stability. CNC-machined Brass Side Wings glide smoothly into barrel slots, while a Delrin Locking C-Clip secures the inner barrel for rock-solid reliability during rapid fire sequences. But what truly sets this chamber apart is its innovative BB Latching System—preventing BB drop when removing magazines and allowing manual release of residual pellets for hassle-free maintenance.

Crafted for serious players seeking precision upgrades, this hopup chamber excels in competitive scenarios where accuracy and durability matter most. Its lightweight aluminum construction reduces weight without compromising strength, while its modular design supports easy customization with aftermarket components. Whether you’re upgrading your HPA-powered setup or enhancing aftermarket builds, the M4P Pro delivers unmatched control and consistency—making it an essential upgrade for airsoft enthusiasts prioritizing performance excellence.