CNC hop-up chamber MAXX Model M4G for AEG and HPA M4 / M16

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MAXX Model M4G is a hybrid upgrade chamber combining the advantages of AEG and GBB / VSR systems. It is designed for GBB / VSR buckings and matching GBB inner barrels, providing better air seal, improved accuracy and more stable trajectory, as these components are originally designed for sniper platforms where precision is critical. The precise CNC machining ensures a perfect fit without play, while the rotary TDC adjustment ring allows fine tuning of the hop-up. Thanks to the replaceable pressure segment and optimized arm, the chamber delivers even pressure on the bucking. The design also includes a BB latching system that prevents BBs from falling out when the magazine is removed. Precise alignment is ensured by the inlet adapter and brass guiding wings, while the Delrin C-clip securely locks the inner barrel in place. As a useful upgrade, we also recommend the EPeS illumination module, which turns the side transparent covers into a tracer unit for TRACER BBs.

Key features of the MAXX Model M4G CNC hop-up chamber

Hybrid upgrade design

Uses GBB / VSR buckings and barrels for improved accuracy and performance with heavy BBs in AEG builds.

Compatible with Maple Leaf buckings

Optimized for GBB hop-up buckings such as Maple Leaf Wonder, Super or MrHop for maximum performance.

TDC rotary adjustment

Precise tuning of TDC pressure for consistent BB trajectory.

Replaceable pressure segment

Adjustable contact surface to match BB weight and shooting style.

BB latching system

Prevents BBs from dropping out and allows manual release.

Precision CNC construction

Aluminum body ensures maximum durability, precision and long lifespan.

Stable barrel alignment

Brass guides and Delrin C-clip keep the barrel firmly in place without movement.

MAXX Model M4G hop-up chamber

Hybrid hop-up chamber designed for maximum accuracy and consistent performance in AEG and HPA builds.

Technical specifications

• Compatibility: AEG and HPA M4 / M16 (TM standard and VFC)
• Bucking type: GBB / VSR
• Barrel type: GBB / VSR
• Material: Aluminum
• System: Rotary TDC hop-up
• Recommended buckings: Maple Leaf Wonder, Super, MrHop
• Length: 51,65 mm
• Height: 37,75 mm
• Weight: Approx. 20 g (chamber only)
• Inlet adapter outer diameter: 11 mm (standard)
• Nozzle inlet diameter: 8 mm

Package contents

• 1× CNC aluminum hop-up chamber M4G
• 2× CNC acrylic side cover
• 2× CNC brass 2,5 mm side wings
• 1× CNC steel pin
• 1× CNC aluminum hop-up arm
• 1× CNC aluminum soft round nub
• 1× CNC aluminum soft flat nub
• 1× CNC aluminum hard concave nub
• 3× Steel nub springs
• 1× CNC steel spring guide
• 1× Steel upper tension spring
• 1× Steel middle tension spring
• 1× CNC Delrin locking C-clip
• 1× CNC brass barrel spacer
• 1× Brass O-ring spacer holder
• 1× CNC aluminum rotary ring
• 1× CNC aluminum inlet adapter
• 1× Shim set
• 1× O-ring set

Warning

• Not compatible with standard AEG buckings.
• Requires GBB / VSR hop-up bucking and GBB / VSR inner barrel with proper cuts.
• Some GBB buckings may require DIY modification of the contact surface.
• Recommended for DMR builds with heavier BBs 0,30+ g