The CNC Aluminum Air Seal Nozzle (21.45 mm) for M4 AEG from MCC is a precision internal upgrade designed for Version 2 gearbox M4/M16 platforms, engineered to improve air seal efficiency, enhance feeding stability, and deliver more consistent compression performance.

Manufactured from CNC-machined aluminum alloy (commonly 7075 or similar depending on production batch), this nozzle provides high rigidity and excellent wear resistance under repeated high-speed cycling. The metal construction helps maintain stable dimensional accuracy over time, reducing deformation compared to standard polymer nozzles, especially in upgraded or high-stress builds.

With a precise length of 21.45 mm, it follows the standard M4/V2 nozzle specification widely used across Tokyo Marui-spec AR platforms. This length is critical for correct BB feeding timing and proper alignment with the hop-up unit, as even small deviations can lead to misfeeds or FPS inconsistencies. SHS-style M4 nozzles commonly share this exact 21.45 mm dimension for compatibility with standard M4/M16 systems.

Many versions include an internal O-ring sealing system, which improves the airtight connection between nozzle and cylinder head. This reduces air leakage during compression, helping stabilize FPS output, improve efficiency, and achieve more consistent shot-to-shot performance.

Precision CNC machining ensures tight tolerances and smooth movement inside the tappet plate system, maintaining reliable alignment with the hop-up unit during each firing cycle, especially in tuned or high-speed builds.

Key Features

CNC Aluminum Air Seal Nozzle (21.45 mm) for M4 from MCC
CNC-machined aluminum construction for high durability and rigidity
Precision 21.45 mm length for M4/M16 V2 gearbox compatibility
Improves air seal stability and compression efficiency
Often includes internal O-ring for reduced air leakage
Enhances FPS consistency and shot-to-shot reliability
Compatible with Tokyo Marui-spec M4/M16 AEG platforms and clones
Designed for upgrade and high-performance builds

A precision-fit internal upgrade designed to improve air seal performance, feeding reliability, and consistency in M4/M16 AEG gearbox systems.