EMG / Maxx Model CNC Aluminum Hopup Chamber for M4 Airsoft AEG Rifles (Model: M4E / EMG Blue)


  • Machined from a solid aircraft aluminum block with tight tolerances to provide better accuracy, consistency and durability
  • BB position is seated straight and consistent 95% stacking up each shot perfectly
  • Prevents jamming and double feeding
  • Designed for tighter tolerances to improver consistency and accuracy
  • Precision rotary dial design for fine hopup adjustments
  • Re-engineered the hopup levers and concave nubs to work best with R-hop, Flat-Hop and Standard-Hop to keep the BBs shooting straight and accurate on every single shot
  • Accepted the nozzle length from 21.00mm to 21.25mm
  • Fully compatible with most aftermarket soft and hard rubber bucking without losing FPS or dropping BBs
The Hopup Chamber M4E unit has been designed to prevent jamming and double feeding and line BBs straight and consistent 95% of the time, stacking up perfectly! They also no longer have screws in place of the hopup arm and are replaced by o-rings to keep the pivot pin. Internal design is updated for tighter tolerances and improves overal consistency and accuracy.

CNC Aluminum Hopup Chamber M4E (with BB Latching System) unit is precisely machined to perform accurately and consistently on Tokyo Marui (include G&G, KRYTAC, except KWA) standard M4/M16 AEG series rifles.

The Hopup Chamber M4E unit is built with an aluminum rotary dial knob for fine hopup adjustments, the precision hopup lever and 4mm bucking nubs to perform best with R-Hop and standard-hop to keep the BB shooting accurately and consistently on every single shot.
The Hopup Chamber M4E unit is designed to accept 21.00mm to 21.25mm nozzle length and fully compatible with most aftermarket soft and hard rubber buckings without losing FPS or dropping BBs during use.

The Hopup Chamber M4E unit is wisely equipped with an interchangeable Inlet Adaptor OD11mm to ensure the hopup unit is inserted exactly in the center of the 11mm inner bore AEG Gearbox/HPA Engine nozzle outlet without wobbling. Also mounted the removable CNC brass side wings to slide smoothly into the outer barrel slots, and included an advanced CNC Delrin locking C-clip to hold the inner barrel tightly in place without wobbling and twisting.

Additionally, the Hopup Chamber M4E unit is specially designed with a new BB Latching System to prevent BBs from dropping after removing the magazine. The Latching Arm can also be manually pressed to release the remaining BB from inside the hopup chamber.

Hopup Kit Includes:
  • 1 x CNC Aluminum Hopup Chamber M4E Pro (with BB Latching System) unit
  • 2 x CNC Acrylic Side Cover
  • 2 x CNC Brass 2.5mm Side Wing
  • 1 x CNC Steel Pivot Pin
  • 1 x CNC Aluminum Hopup Lever
  • 1 x CNC Aluminum Soft Round Nub
  • 1 x CNC Aluminum Soft Flat Nub (4mm)
  • 1 x CNC Aluminum Hard Concave Nub (4mm)
  • 3 x Steel Nub Spring
  • 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 Aluminum Rotary Dial Knob
  • 1 x CNC Aluminum Inlet Adaptor (OD11mm)
  • 1 x CNC Brass Inlet Spacer
Overall Length: 51.65mm
Overall Height: 37.75mm
Inlet Adaptor Outer Diameter (to fit into Gear Box): 11mm
Hub Outer Diameter (to fit into Outer Barrel): 12mm
Hub Inner Diameter (to fit Nozzle): 8mm
Feeder Outer Diameter (to fit magazine): 8.85mm
Feeder Length (to fit magazine): 6mm
Application: Tokyo Marui G&G, Madbull, Modify, TNT, Krytac, Maple Leaf, Begadi, VFC and other compatible M4/M16 standard AEG version 2 gear box
Material: Aluminum 6061
Test results: FPS might be increased by 5% to 10%. Please check your FPS!

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