Guarder Air Nozzle for M4/M16/X177

£11.99

Bore-up air seal nozzle for M4, M16 and X177 airsoft AEGs
Machined from high-grade POM for low friction and heat resistance
Built-in internal O-ring for a tighter seal against the cylinder head
Improves air compression and consistency for steadier FPS
Approx 21 mm length, Tokyo Marui spec Version 2 gearbox fit
Helps reliable feeding of BBs into the hop chamber

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Description
Specification

A better air seal, more consistent shots

The Guarder M4 / M16 Bore-Up Air Seal Nozzle is a precision replacement for the stock nozzle in Version 2 gearbox airsoft AEGs. The nozzle guides each BB into the hop chamber and seals against the cylinder head, so a good one is central to consistent compression and steady FPS.

POM build with a built-in O-ring

It is machined from high-grade POM, an engineering plastic prized for low friction, dimensional stability and heat resistance. An internal O-ring seals against the cylinder head to cut air loss, which keeps your muzzle velocity consistent and reduces the vertical spread that hurts accuracy at range.

Correct fit for M4, M16 and X177

At around 21 mm it matches Tokyo Marui M4, M16 and X177 spec, dropping into the vast majority of V2 gearbox M4 and M16 replicas. Guarder recommends pairing it with a bore-up or Systema-style cylinder head for maximum compression.

Reliable feeding and long service life

A precise nozzle also improves how cleanly BBs feed into the hop chamber, cutting misfeeds. As a hard-wearing part it outlasts plain stock nozzles under sustained fire. Explore more airsoft parts and accessories, or book our Kent repair and servicing team to fit and seal-check it for you.

Product information reviewed by James Smith. Every gun is checked & serviced by our Rochester workshop before dispatch.

General
Brand	Guarder
Platform	M4 / M16 / X177 airsoft AEG
Dimensions
Length	Approx 21 mm
Other
Type	Air seal nozzle (bore-up)
Material	POM (polyoxymethylene) engineering plastic
Function	Air seal, compression and BB feeding
Gearbox compatibility	Version 2 (Tokyo Marui spec)
Seal	Internal O-ring
Best paired with	Bore-up / Systema-style cylinder head
Calibre	6 mm BB

Recommended upgrades & accessories

Frequently asked questions

What does the air nozzle do in an AEG?

The nozzle sits on the tappet plate. It guides each BB from the magazine into the hop up chamber and seals against the cylinder head so compressed air is delivered efficiently behind the BB when the gun fires.

Why is the O-ring important?

The internal O-ring creates a tighter seal between the nozzle and the cylinder head, reducing air loss. A better seal gives more consistent compression, which steadies your FPS shot to shot and tightens vertical spread at range.

Will it fit my M4 or M16?

It is made to Tokyo Marui M4, M16 and X177 spec at around 21 mm length, so it fits standard Version 2 gearbox M4 and M16 replicas from most major clone brands. Guarder recommends it with bore-up or Systema-style cylinder heads.

Why choose POM over a standard nozzle?

POM is a hard-wearing engineering plastic with low friction and good heat resistance. Compared with a plain stock nozzle, it resists abrasion, lasts longer and helps keep the air seal consistent under sustained fire.

Do I need to change anything else with it?

Not necessarily, but for the best air seal we suggest checking your cylinder head O-ring and bucking at the same time. Our workshop can fit the nozzle and confirm your compression while the gearbox is open.

Guarder Air Nozzle for M4/M16/X177