The CNC Aluminum Hopup Chamber M4i Pro (with BB Latching System) unit is meticulously crafted to ensure precise and consistent performance across the ICS CXP/CS4/EBB (including old models) M4/M16 AEG series. This hopup chamber features an aluminum Rotary Dial Knob for fine adjustments, a precision Hopup Lever, and 4mm Bucking Nubs (optional 6mm) optimized for R-Hop and Standard-Hop, ensuring accurate and consistent BB shooting with every shot.

Designed to accommodate nozzle lengths ranging from 21.00mm to 21.25mm, the Hopup Chamber M4i unit is fully compatible with most aftermarket soft and hard rubber buckings, maintaining FPS and preventing BB drop during use.

To ensure precise alignment, the Hopup Chamber M4i unit includes an interchangeable Inlet Adaptor OD12mm, preventing wobbling when inserted into the 12mm inner bore ICS AEG Gearbox nozzle outlet. Additionally, it features removable CNC Brass Side Wings for smooth insertion into outer barrel slots, along with a CNC Delrin Locking C-Clip to secure the inner barrel firmly in place.

Moreover, the Hopup Chamber M4i Pro unit boasts a new BB Latching System, preventing BB drop post-magazine removal. The Latching Arm can be manually pressed to release remaining BBs from inside the hopup chamber.

For added functionality, the optional Dual UV LED Tracer Module illuminates BBs in low-light conditions, offering enhanced visibility. The unit is compatible with most ICS CXP/CS4/EBB (including old models) M4/M16 AEG series, making it an essential accessory for airsoft enthusiasts seeking optimal performance.

Includes:

• 1 x CNC Aluminum Hopup Chamber M4i Pro (with BB Latching System) unit
• 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 Oring
• 1 x CNC Aluminum Rotary Dial Knob
• 1 x CNC Aluminum Inlet Adaptor (OD12mm)
• 1 x CNC Brass Inlet Spacer

Specification:

• Overall Length: 51.65mm
• Overall Height: 38.75mm
• Inlet Adaptor Outer Diameter (to fit into Gear Box): 12mm
• 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 aluminum block with tight tolerances to achieve the most accuracy, consistency, and durability
• Performed accurately and consistently on ICS CXP/CS4/EBB (include old models) 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 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 12mm inner bore ICS AEG Gearbox nozzle outlets
• The Dual UV LED Tracer Module to glow BB in the dark ready! Compatible with most ICS CXP/CS4/EBB (include old models) M4/M16 AEG series