MAXX CNC Aluminum HopUp Chamber M4G (For Standard M4)

Price: $79.99 – $99.65 — In stock at 2 retailers.

Prices last checked July 30, 2026 across 3 retailers.

What's Included? Maxx CNC Aluminum Hopup Chamber M4G 2 x CNC Acrylic Side Cover 2 x CNC Brass 2.9mm 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 (OD12mm) 1 x CNC Brass Inlet Spacer 1 x Shim Set 1 x O-Ring Set 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 nozzle length from 21.00mm to 21.25mm 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 12mm inner bore ICS AEG Gearbox/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 Technical Specifications: Model Number: MX-HOP020MG Overall Length: 51.65mm Overall Height: 37.75mm Application: Tokyo Marui and other compatible M4 / M16 AEG rifles Material: Aluminum 6061 Q A Q: Is the Maxx CNC Aluminum Hopup Chamber M4G compatible with various bucking types? A: Yes, the hopup chamber is fully compatible with most aftermarket soft and hard rubber buckings. It works especially well w

MAXX CNC Aluminum HopUp Chamber M4G (For Standard M4) price comparison: the lowest price is $79.99 at LA Airsoft, the highest is $99.65, and the median across 3 tracked listings is $79.99. Comparing retailers can save up to 20% ($19.66) versus the highest-priced listing.

Compatible with: M4/AR

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