Maxx CNC Aluminum Hop-up Chamber M4G for Standard M4

The Maxx CNC Aluminum Hop-up Chamber M4G is a precision upgrade designed for Tokyo Marui / VFC M4/M16 AEG platforms. It delivers consistent hop-up control and a secure, wobble-free fit across every shot.

• Material and precision: CNC-machined aluminum construction delivers durable, tightly formed tolerances for stable hop-up performance on compatible TM/VFC M4/M16 AEGs.
• Fine adjustment: An aluminium Rotary Dial Knob provides fine-tuned hop-up control for different BB weights and shooting conditions.
• Interchangeable Inlet Adaptor: Ensures the hop-up unit sits centered in the inner bore nozzle outlet, minimizing wobble during firing.
• Mounting stability: Removable CNC Brass Side Wings slide into outer barrel slots, paired with a CNC Delrin Locking C-Clip to keep the inner barrel secure against movement.
• BB retention system: A new BB Latching System prevents BBs from dropping after magazine removal; the Latching Arm can be pressed to release remaining BBs for maintenance or cleaning.
• Compatibility and rubber guidance: Compatible with Maple Leaf Wonder & Super GBB hop-up rubbers; other GBB rubbers can be used but may require cutting the centering flat to fit. Not compatible with standard AEG rubber without a GBB inner barrel.
• Complete kit included: Includes the CNC Aluminium Hop-up Chamber M4G, 2 x CNC Acrylic Side Covers, 2 x CNC Brass Side Wings (2.5mm), 1 x CNC Steel Pivot Pin, 1 x CNC Aluminium Hop-up Lever, 1 x CNC Aluminium Soft Round Nub, 1 x CNC Aluminium Soft Flat Nub, 1 x CNC Aluminium Hard Concave Nub, 3 x Steel Nub Springs, 1 x CNC Steel Spring Guide, 1 x Steel Upper Compression Spring, 1 x Steel Center Compression Spring, 1 x CNC Delrin Locking C-Clip, 1 x CNC Brass Barrel Spacer, 1 x Brass Barrel Spacer Holder O-ring, 1 x CNC Aluminium Rotary Dial Knob, 1 x CNC Aluminium Inlet Adaptor, 1 x Shim Set, 1 x O-ring Set.
• Platform focus: Specifically engineered for standard M4 replicas based on Tokyo Marui / VFC and clones sharing the same specifications, ensuring reliable fit and operation.

With this chamber, you gain predictable hop-up behavior and precise barrel alignment, supporting repeatable accuracy and easier maintenance in field or bench scenarios. It’s ideal for players and builders aiming to optimize hop-up performance when using GBB hop-up rubbers and dedicated inner barrels, delivering consistent results across sessions and varying BB weights.