SKU: 25780780722

MAXX CNC Aluminum Hopup Chamber M4W (for MTW M4)

Sale price$98.99 Regular price$109.99
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Description

MAXX CNC Aluminum Hopup Chamber M4W (for MTW M4)CNC Aluminum Hopup Chamber M4W unit is precisely machined to perform accurately and consistently on HPA MTW Milspec, Forged, Billet and MTW 9 series. The Hopup Chamber M4W 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 M4W unit is designed to

CNC Aluminum Hopup Chamber M4W unit is precisely machined to perform accurately and consistently on HPA MTW Milspec, Forged, Billet and MTW-9 series.

The Hopup Chamber M4W 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 M4W unit is designed to accept the HPA MTW Engine M4 nozzle length, and fully compatible with most aftermarket soft and hard rubber buckings without losing FPS or dropping BB during use.

The Hopup Chamber M4W 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 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 tight in place without wobbling and twisting.

Manufacturer: Maxx Model

Features

  • Machined from a solid aircraft aluminum block with tight tolerances to provide better accuracy, consistency, and durability
  • Precision rotary dial design for fine hopup adjustments
  • Re-engineered the hopup levers and 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 HPA MTW Engine M4 nozzle length
  • Fully compatible with most aftermarket soft and hard rubber bucking without losing FPS or dropping BBs
  • Equipped with a new CNC Delrin Locking C-Clip design to hold barrel tight without wobbling and twisting, 3 compression springs on top, at bottom and in center of housing to ensure the hopup unit is exactly centered, straight and air tight
  • Compatible with any 11mm inner bore HPA Engine nozzle outlets
  • Specially designed with BB Latching System to prevent dropping BBs after removing the magazine, Manually opened to release BBs from inside hopup chamber by hand

Hopup Kit Includes:

  • 1 x CNC Aluminum Hopup Chamber M4W unit
  • 2 x CNC Acrylic Side Cover
  • 2 x CNC Brass 2.6mm 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 Oring
  • 1 x CNC Aluminum Rotary Dial Knob
  • 1 x CNC Aluminum Inlet Adaptor (OD11mm)


Overall Length: 51.15mm
Overall Height: 22mm
Inlet Adaptor Outer Diameter (to fit into HPA Nozzle Outlet): 11mm
Hub Outer Diameter (to fit into Outer Barrel): 12mm
Hub Inner Diameter (to fit Nozzle): 8mm
Application: For most HPA MTW Milspec, Forged, Billet and MTW-9 series rifles
Material: Aluminum 6061

Test Results: FPS might be increased from 10FPS to 30FPS over the stock setup. Please check your FPS!
Disclaimer: Professional installation highly recommended. Please use discretion when installing custom parts as fit and compatibility may vary. Modification may be required. Professional installation recommended.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 25780780722

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G M
Draper, US
★★★★★ 2
Don't waste your money.
Item Package Quantity: 1
Did not work!
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Reviewed in the United States on May 7, 2026
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Michael McCollum
New York, US
★★★★★ 1
Doesn't work
Item Package Quantity: 1
No effect at all on my headlights. Don't waste your money.
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Reviewed in the United States on April 30, 2026
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Stephen Woods
Los Angeles, US
★★★★★ 5
Well worth the money. And easy to use.
Item Package Quantity: 1
For what it cost, it worked way better than I expected. 👍
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Reviewed in the United States on April 16, 2026
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Athena
Belleville, US
★★★★★ 5
The best!
Size: Gravity, Color: Black
Probably the best, most functional, most adaptable (to different cars, going on #3), longest lasting car mount I've tried. Getting another one for my 16 year old who is about to start drinking.
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Reviewed in the United States on April 20, 2026
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Average Consumer
Belleville, US
★★★★★ 5
Must have!
Size: Gravity, Color: Black
I couldn't be more happy with this thing.It's been with me for a couple years now.And it's so sturdy, it gets tightened when loose, and it's easy to remove for cleaning
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Reviewed in the United States on December 13, 2025

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