GBBR Parts

The Guns Modify competition hop up adjustment wheel is a premium upgrade part designed to help the user dial in their hop up more precisely giving...

Perhaps the most complete hop-up system for the Marui MWS series, this set from Guns Modify comes with everything required to replace the stock ho...

New improved design to work with more hop up rubbers and a wider range of BB weights! New arm in anodised in gold colour machined from 7075 alumi...

This quality Hop Unit from Laylax ensures a stable consistent Hop Up. This custom chamber is compatible for Tokyo Marui Gas Blowback M4 series! T...

This CNC Aluminum Hop up Chamber/Adjuster M4T set is precisely machined from a solid Aluminum block to perform accurately and consistently for To...

This CNC Aluminum Hop up Chamber M4T One unit is precisely machined from a solid Aluminum block to perform accurately and consistently for Tokyo ...