The POM Seal Air Nozzle Made of DELRIN with Inner O-Ring for M4/M16 (SPM4P) from FPS is a precision internal upgrade designed for M4/M16 AEG platforms, engineered to improve air seal efficiency, enhance shot consistency, and increase overall gearbox reliability.
Manufactured from CNC-machined DELRIN (POM / acetal polymer), this nozzle offers a self-lubricating, low-friction surface that reduces wear on the cylinder head and tappet plate during rapid cycling. The material’s high dimensional stability and smooth operation make it a reliable upgrade over standard factory polymer nozzles.
A key feature of this nozzle is its integrated internal O-ring, which significantly improves the air seal between the nozzle and cylinder head. This tighter compression reduces air leakage during firing, helping to stabilize FPS output, improve efficiency, and deliver more consistent shot-to-shot performance.
With a standard length of approximately 21.2 mm, it is designed for Tokyo Marui-spec M4/M16 AEG gearbox systems. Correct nozzle length is critical in these platforms, as even small deviations can affect BB feeding timing, air seal synchronization, and overall performance consistency.
Precision CNC machining ensures consistent tolerances and smooth internal movement, helping maintain stable alignment with the hop-up unit while reducing unnecessary friction and wear during operation.
Key Features
POM Seal Air Nozzle Made of DELRIN with Inner O-Ring for M4/M16 (SPM4P) from FPS
CNC-machined DELRIN (POM) construction for low friction and durability
Integrated internal O-ring for improved air seal performance
Enhances FPS consistency and compression efficiency
Approx. 21.2 mm length for M4/M16 AEG compatibility
Self-lubricating material reduces internal wear and friction
Improves feeding reliability and gearbox stability
Designed for Tokyo Marui-spec M4/M16 AEG platforms and compatible clones
A lightweight, high-precision internal upgrade designed to improve air seal performance, consistency, and long-term reliability in M4/M16 AEG gearbox systems.
