LayLax Prometheus Air Sealing Nozzle NEO for TM NGRS M4 / HK416 Series

The LayLax Prometheus Air Sealing Nozzle NEO is an internal compression upgrade for Tokyo Marui NGRS M4 and HK416 series electric blowback rifles. Its job is to stop air leaking between the cylinder head shaft and the nozzle bore, so the air you compress goes behind the BB.

It is injection-moulded from low-friction polyacetal (POM) for smooth feeding through the hop-up chamber and less sliding friction, and it uses an internal Nitrile O-ring to seal the cylinder head. The length is to factory spec, so it seals correctly against the hop-up bucking.

Key Features

• For Tokyo Marui NGRS M4 and HK416 series AEGs
• Internal Nitrile O-ring – seals against air leaks
• Low-friction POM body for smooth feeding
• Factory-spec length for a correct bucking seal
• Direct replacement on OEM and upgraded NGRS cylinder heads
• Consistent shot-to-shot muzzle velocity

Real-World Use Cases

Fit this if your NGRS rifle has lost power or consistency, as a leaking nozzle is a common cause. It is also a sensible part to swap while the gearbox is open for other upgrades.

Pair it with a good cylinder head seal and a fresh bucking for the best result.

Technical Specifications

• Type: Internal air sealing nozzle
• Fits: Tokyo Marui NGRS M4 and HK416 series AEGs
• Material: Low-friction polyacetal (POM)
• Seal: Internal Nitrile O-ring
• Length: Factory specification
• Installation: Direct replacement on OEM and upgraded NGRS cylinder heads
• Colour: White / translucent

UK Legal & Site Notes

Internal parts are accessories, not imitation firearms, so no defence is needed. Fitting a nozzle means opening the gearbox, so use a competent tech if you are unsure.

Order the LayLax Prometheus NEO nozzle from Airsoftdirect for fast UK delivery, and ask us if you need help checking it suits your rifle.