The Maxx CNC Aluminium Hopup Chamber M4P Pro (with BB Latching System) unit is precisely machined to perform accurately and consistently on HPA PolarStar Engines built on standard M4/M16 platforms.

It comes with an aluminium Rotary Dial Knob for fine hop up adjustments, the precision hop up 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.

The Hopup Chamber M4P unit is designed to accept the PolarStar HPA 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 M4P unit is equipped with an interchangeable Inlet Adaptor Outer Diameter 11mm to ensure the hop up unit is inserted exactly in the center of the 11mm inner bore of the AEG Gearbox or HPA nozzle outlet without wobbling. (Inlet Adaptor OD11.5mm and OD12mm are optional).

Removable CNC Brass Side Wings allow the unit to slide smoothly into the outer barrel slots, and an advanced CNC Delrin Locking C-Clip holds the inner barrel tightly in place without wobbling and twisting.

A new BB Latching System prevents BBs dropping out after removing the magazine. The Latching Arm can also be manually pressed to release the remaining BBs from inside the hop up chamber.

Includes

• 1 x CNC Aluminium Hopup Chamber M4P 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 Aluminium Hopup Lever
• 1 x CNC Aluminium Soft Round Nub
• 1 x CNC Aluminium Soft Flat Nub (4mm)
• 1 x CNC Aluminium 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 Aluminium Rotary Dial Knob
• 1 x CNC Aluminium Inlet Adaptor (OD11mm)

Specification

• Overall Length: 51.15mm
• 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: Aluminium 6061

Features

• Machined from a solid aircraft aluminium block with tight tolerances to achieve the most accuracy, consistency, and durability
• Performs accurately and consistently on Tokyo Marui Standard M4/M16 AEG series
• Precision Rotary Dial Knob for fine hopup adjustments
• Re-engineered 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
• Accepts PolarStar HPA Engine M4 nozzle length
• Fully compatible with most aftermarket soft and hard rubber buckings without losing FPS or dropping BB during use
• Equipped with an interchangeable Inlet Adaptor OD12mm to ensure the hopup unit is inserted exactly in the center of the 12mm inner bore ICS AEG Gearbox nozzle outlet without wobbling. (Inlet Adaptor OD11mm and OD11.5mm 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 center to ensure the hopup unit is seated straight and air tight during use
• Specially designed with a new BB Latching System to prevent BB dropping after removing the magazine
• The Latching Arm can also be manually pressed to release the remaining BB from inside the hopup chamber
• Compatible with any 11mm inner bore AEG gearbox or HPA engine nozzle outlets
• Compatible with Dual UV LED Tracer Module

Usage

•  Compatible with HPA PolarStar Engines built on standard M4/M16 platforms.

Requires

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