Maxx CNC Aluminium Hop Chamber - M4A Pro

• Material: Machined from 6061 aircraft-grade aluminum for strength, rigidity, and long-term durability
• Compatibility: Designed to fit most standard M4/M16 AEGs, tested with Tokyo Marui, G&G, KRYTAC, and Evolution platforms
• Fine Hop-Up Control: CNC aluminum Rotary Dial Knob enables micro-adjustments for precise hop-up tuning
• Buckings & Nubs: Includes 4mm bucking nubs with optional 6mm nubs to support R-Hop and standard-hop configurations
• Precise Alignment: Interchangeable Inlet Adaptor OD11mm ensures centered alignment within the 11mm gearbox nozzle outlet; OD11.5mm and OD12mm options available
• Stability Features: Removable CNC Brass Side Wings slide into outer barrel slots; CNC Delrin Locking C-Clip holds the inner barrel securely without wobble
• BB Latching System: Innovative latching mechanism prevents BBs from dropping after magazine removal; arm can be manually pressed to release remaining BBs
• Optional Upgrades: Dual UV LED Tracer Module available (7–15V) to illuminate BBs in low light; sold separately
• Dimensions & Fit: Overall length 51.65mm, height 37.75mm; nozzle inlet Ø11mm, hub Ø12mm, nozzle Ø8mm; feeds 8.85mm magazine feeder and 6mm feeder length
• Performance: Test data indicate potential FPS gains of 10–30 FPS over stock setups, depending on nozzle and bucking combination

The Maxx CNC Aluminium Hop Chamber - M4A Pro delivers repeatable accuracy and reliable feeding with a rugged, aircraft-grade aluminum build. Its precision fit, center-aligned inlet, and BB retention system address common reliability issues, making it a practical upgrade for dedicated players who want consistent shot-to-shot performance and clearer tuning control across R-Hop and standard-hop setups. The modular design supports additional adapters and tracer options, allowing you to tailor the hop system to your field, ammo, and playing style.

	Includes
	1 x CNC Aluminum Hopup Chamber M4A 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 Oring
	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
	Material: Aluminum 6061

	Features
	Machined from a solid aircraft aluminium block with tight tolerances to achieve the most accuracy, consistency, and durability
	Performed accurately and consistently on Tokyo Marui (include G&G, KRYTAC, except KWA) Standard M4/M16 AEG series
	Precision Rotary Dial Knob for fine hopup adjustments
	Re-engineered the precision Hopup Lever and 4mm Bucking Nubs (6mm Bucking Nubs are optional) to perform best with R-Hop and Standard-Hop to keep the BB shooting accurately and consistently on every single shot
	Removable Steel Pivot Pin for ease of setup and maintenance
	Accepted 21.00mm to 21.25mm nozzle length
	Fully compatible with most aftermarket soft and hard rubber buckings without losing FPS or dropping BB during use
	Wisely equipped with an interchangeable Inlet Adaptor OD11mm to ensure the hopup unit is inserted exactly in the centre of the 11mm inner bore AEG Gearbox/HPA Engine nozzle outlet without wobbling. (Inlet Adaptor OD11.5mm and OD12mm are sold separately)
	Mounted the removable CNC Brass Side Wings to slide smoothly into the outer barrel slots
	Included an advanced CNC Delrin Locking C-Clip to hold the inner barrel tight in place without wobbling and twisting
	Equipped with 2 compression springs on top and centre to ensure the hopup unit is seated straight and air-tight during use
	Specially designed with a new BB Latching System to prevent BB from dropping after removing the magazine
	The Latching Arm can also be manually pressed to release the remaining BB from inside the hop-up chamber
	Compatible with any 11mm inner bore AEG Gearbox/HPA Engine nozzle outlets
	The Dual UV LED Tracer Module to glow BB in the dark is ready!

	Weight
	N/A grams

	Usage
	Compatible with most standard M4/M16 AEG series including;Tokyo Marui, G&G, KRYTAC, Evolution

	Requires
	Wearing eye protection is recommended
	Use proper tools for disassembly and reassembly the gearbox with great care due to spring tension
	Bearing lubricant oil/grease is recommended for smooth operation

	Instruction
	Instruction Manuals are included