Classic Army, G36 hopup chamber

Classic Army Metal Hopup Unit for Classic Army M4/M16 series. Also works well with all metal body upgrades from various manufacturers. Even works with stock Marui M4 and M16 style airsoft rifles with some modification.

Classic Army MP5 (P065M Type) Hopup Chamber for replacement or repair of existing hopup units.  Can be used to replace any TM/Classic Army compatible MP5.*Note: Not compatible with new B&T eries MP5's from Classic Army.

G&P 1pc Metal Hop Up Chamber for M4/M16 G&P Hop Up Bucking included 

Replacement Hop-up assembly for ICS M4 or M16 series airsoft rifles ONLY. Does not include hop-bucking or hop bucking spacer. *FOR USE ONY WITH ICS AEG's.

The first mass production LED module for Hopup is now here from Madbull.  Designed to be used with the Madbull Ultimate Hopup unit, you can change your Hopup chamber to be a tracer unit easily.

SRC replacement hopup bucking and spacer

Systema Hopup Unit for M16/M4 style airsoft rifles. Works best for Marui and Classic Army AEGs. May be adapted to others also. Designed for use with metal bodies.

You will need this if you get one of the aftermarket PTW tightbores that are coming out, you can leave your stock barrel in your other hop-up unit and save yourself a LOT of trouble by just buying a new hop-up for your new barrel! This is also a replacement for broken/damaged PTW hop-up units.

When you\'re PTW hop-up bucking gets worn, you will need one of these to replace it. Better to have an extra and not need it, than to have a need for one and not have it!