MAXX CNC Hop-up Chamber M4A PRO (AEG) – Red

Maxx Model CNC hop-up chamber M4A PRO in red is a top-tier upgrade part for AEG M4 / AR15 replicas. It offers precise CNC machining, rotary TDC adjustment and maximum shot consistency. Thanks to compatibility with R-Hop and standard buckings and precise fitment, it ensures stable performance without FPS loss. The BB latching system prevents BB loss during magazine changes.

CNC hop-up chamber Maxx Model M4A PRO for AEG M4 / M16

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Maxx Model M4A PRO hop-up chamber ranks among the absolute top on the market and is designed for demanding players. The chamber is machined from a single piece of aircraft-grade aluminium using CNC, ensuring tight tolerances and perfect alignment with both the receiver and gearbox. The rotary dial allows fine hop-up adjustment, while the redesigned TDC pressure arm ensures even pressure on the bucking. The chamber is fully compatible with R-Hop and standard AEG hop-up buckings and supports nozzles in the range of 21.00 to 21.25 mm, with 21.20 mm working best in most builds (always depends on your setup). Thanks to the BB latching system, BBs stay inside the chamber after removing the magazine and can also be manually released. Precise alignment with the gearbox is ensured by a replaceable inlet adapter and brass guide wings, eliminating misalignment and improving barrel stability. As a great upgrade, we also recommend the EPeS tracer unit, which turns the transparent side covers into an illumination unit for tracer BBs.

Key features of the Maxx Model M4A PRO CNC hop-up chamber

Technical specifications

• Compatibility: AEG M4 / M16 Tokyo Marui standard (except KWA)
• Material: 6061 aluminium
• Weight: 20 g
• Color: Red
• Length: 51.65 mm
• Height: 37.75 mm
• Gearbox fit diameter: 11 mm
• Outer barrel fit diameter: 12 mm
• Inner diameter: 8 mm
• Feeding tube diameter: min 8.85 mm
• Feeding tube length: max 6 mm
• Compatible nozzles: 21.00 to 21.25 mm

Package contents

• 1× CNC chamber with BB latching system
• 2× Transparent CNC vinyl cover
• 2× 2.5 mm CNC brass side wings
• 1× CNC steel pivot pin
• 1× CNC aluminium hop-up arm
• 1× CNC aluminium soft round nub
• 1× CNC aluminium soft flat nub 4 mm
• 1× CNC aluminium hard concave nub 4 mm
• 3× Steel nub springs
• 1× Steel spring guide
• 1× Steel upper tension spring
• 1× Steel central tension spring
• 1× CNC Delrin locking C-Clip
• 1× CNC brass barrel spacer
• 1× Brass O-ring spacer
• 1× CNC aluminium adjustment dial
• 1× Aluminium CNC inlet adapter 11 mm
• 1× CNC brass inlet spacer