ZCI Metal CNC Air Nozzle (M4) 21.4mm

£7.99

CNC-machined aluminium for strength and durability over plastic nozzles
Sized 21.4mm to suit M4 and M16 series AEG platforms
Internal O-ring gives a tight air seal for better efficiency
Reduces air loss for a more stable, consistent shot
Precision-machined for a reliable, repeatable fit
Popular value upgrade for M4/M16 gearbox rebuilds

Hurry! Only 1 unit left in stock!

Guaranteed Safe Checkout

Why Buy From Platoon Stores

In-House Repair Workshop in Rochester Kent

Kent's Only Authorised 5.11 Tactical Retailer

UKARA Registered Retailer

What our customers are saying

Be the first to leave a review.

Write a Review

There are no reviews yet.

Description
Specification

Overview

The ZCI Metal CNC Air Nozzle is a 21.4mm nozzle for M4 and M16 series airsoft AEGs. Machined from aluminium, it replaces the stock nozzle with a stronger, more precise part that seals better inside the gearbox.

Better air seal

An internal O-ring seals the nozzle against the cylinder head, cutting the air loss that robs a stock setup of efficiency. The result is more consistent compression and steadier FPS shot to shot.

Built to last

CNC-machined aluminium holds its dimensions and shrugs off the wear that can distort softer plastic nozzles, so it stays reliable through heavy skirmish use.

Fitting and compatibility

The 21.4mm length is correct for M4/M16 series platforms, and nozzle length is platform-specific, so match it to your gun. Because nozzle choice affects both sealing and feeding, our Kent airsoft repair workshop can fit and test it if needed. Find more parts under airsoft accessories.

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

General
Brand	ZCI
Platform	M4 / M16 series AEG
Dimensions
Length	21.4mm
Other
Type	AEG air nozzle
Material	CNC-machined aluminium
Internal seal	O-ring fitted
Function	Air seal between cylinder head and hop unit
Benefit	Reduced air loss, more consistent FPS
Compatibility	Version 2 M4/M16 gearboxes

Recommended upgrades & accessories

Frequently asked questions

What length nozzle do I need for an M4?

Standard M4 and M16 series AEGs use a 21.4mm nozzle, which is the size of this ZCI part. Nozzle length is platform-specific, so confirm your gun's requirement before ordering.

Why does the internal O-ring matter?

The O-ring seals the nozzle against the cylinder head so air is not lost at that joint. A better seal means more consistent compression and steadier FPS.

Is a metal nozzle better than plastic?

A CNC aluminium nozzle is more durable and holds its dimensions better than many plastic nozzles, which helps long-term reliability in a hard-used gearbox.

Will it fit any gun?

It fits M4/M16 series AEGs that use a 21.4mm nozzle. Other platforms use different lengths, so it is not a universal part. Some fitting knowledge helps ensure clean feed and seal.

Does the nozzle affect feeding?

Yes. Nozzle length and inner diameter affect how BBs feed from the hop unit, so using the correct 21.4mm size for an M4 platform is important for reliable feeding.

ZCI Metal CNC Air Nozzle (M4) 21.4mm