JG / Golden Eagle Transparent M4 Hop Unit

£4.95

Transparent body lets you watch BB feeding in real time
Fits most M4 / M16 AEGs with a Version 2 gearbox
Rotary hop adjustment for dialling in consistent range
Ideal for diagnosing feed and hop faults during a tech
Simple, low-cost replacement for a cracked stock chamber
Great starter part for anyone learning gearbox work

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In-House Repair Workshop in Rochester Kent

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Description
Specification

See exactly what your hop is doing

The JG / Golden Eagle Transparent M4 Hop Unit (JGG-08-002188) swaps guesswork for a clear view. Because the chamber body is see-through, you can watch BBs feed from the magazine and check the hop nub as you adjust it, which makes setting up range and accuracy far more straightforward.

Broad M4 compatibility

Built for M4 and M16 pattern AEGs on the standard Version 2 gearbox, it drops into a huge range of popular electric rifles. It works with your existing standard AEG hop rubber and inner barrel, so there is no need to buy extra parts to get running.

A tech’s diagnostic friend

Chasing a feeding jam or an erratic hop? A clear chamber lets you spot the problem instantly instead of stripping the gun blind. That makes this an ideal part for anyone learning gearbox work as well as a quick fix for a cracked stock chamber.

Fitting and support

Installation means opening the upper receiver and fitting the new chamber, then setting the hop. If you would rather leave it to a specialist, our airsoft repair service in Kent can handle it, and you can browse more spares in our airsoft accessories.

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

General
Brand	Golden Eagle
Other
Part Number	JGG-08-002188
Type	Hop-up chamber
Compatibility	M4 / M16 AEG
Gearbox	Version 2
Material	Transparent polymer
Adjustment	Rotary hop adjuster
Calibre	6mm BB
Use	Standard AEG hop rubber and inner barrel

Recommended upgrades & accessories

Frequently asked questions

What guns does this hop unit fit?

It is designed for M4 and M16 pattern AEGs running a standard Version 2 gearbox, which covers a large share of popular electric rifles.

Why choose a transparent chamber?

The clear body lets you see the BB feed and hop nub while you work, which makes diagnosing feeding jams and setting the hop far easier during a build or repair.

Does it come with a hop rubber and barrel?

It is supplied as the chamber unit. It works with standard AEG hop rubbers (buckings) and inner barrels, so you can reuse your existing internals.

Is it hard to fit?

It is a beginner-friendly job that involves opening the upper receiver and swapping the old chamber for this one. Some basic tech experience helps with hop setup afterwards.

Do I need a UKARA or to be 18 to buy it?

No. This is an internal spare part, not a firearm, so there is no age restriction and no UKARA requirement.

JG / Golden Eagle Transparent M4 Hop Unit