MAXX CNC Hop-up Chamber M4G (ICS AEG → VSR) – Black

MAXX Model CNC hop-up chamber M4Gi in black is a unique hybrid upgrade for AEG ICS M4 platforms (SSS / CXP / CS4 / EBB including older models). It uses GBB / VSR buckings and inner barrels, delivering higher accuracy, tighter grouping and consistent performance. With CNC construction and precise TDC adjustment, it takes your rifle performance to the next level. Ideal for DMR builds.

CNC hop-up chamber MAXX Model M4Gi for AEG ICS M4

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MAXX Model M4Gi is a hybrid upgrade chamber combining the advantages of AEG and GBB / VSR. It is designed for GBB / VSR buckings and matching GBB inner barrels, ensuring better air seal, higher accuracy and more stable trajectory, as these components are originally designed for sniper platforms where precision is essential. The chamber is specifically designed for ICS AEG rifles (SSS, CXP, CS4, EBB and older models), providing perfect compatibility and fit. Precise CNC machining ensures tight tolerances, while the rotary TDC adjustment ring allows fine tuning of hop-up pressure. Thanks to the replaceable pressure segment and optimized arm, the chamber delivers even pressure on the bucking. The design also features a BB latching system with lever that prevents BBs from falling out and allows quick manual release. Precise alignment is ensured by the inlet adapter and brass guiding wings, while the Delrin C-clip locks the inner barrel securely in place. As a useful upgrade, we also recommend the EPeS illumination module, which converts the side transparent covers into a tracer unit for TRACER BBs.

Key features of the MAXX Model M4Gi CNC hop-up chamber

Technical specifications

• Compatibility: ICS AEG M4 (SSS, CXP, CS4, EBB and older models)
• Bucking type: GBB / VSR
• Barrel type: GBB / VSR
• Material: Aluminum
• System: Rotary TDC hop-up
• Recommended buckings: Maple Leaf Wonder, Super, MrHop
• Length: 51,15 mm
• Height: 37,75 mm
• Weight: Approx. 20 g
• Inlet adapter outer diameter: 11 mm
• Nozzle inlet diameter: 8 mm

Package contents

• 1× CNC aluminum hop-up chamber M4Gi
• 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.