Reinforced redesigned metal version Gen­2 gearbox with ultra­smooth 8mm bearings

Length: 1

Charger Dimensions: 2

This hopup is equipped with 3 O-rings as well as 3 Compression Springs on the top

this is probably your best option

Wolverine/Heretic Labs Tank Grip for MTW/Article I Hi-Capa Recoil Spring Reinforced redesigned metal version Gen­2Take the weight off your shoulders with the Heretic Labs Tank Grip. Attach an HPA tank directly into your Heretic or MTW Spec HPA replica and youre ready to go. Powered by the lightning fast Wolverine Airsoft Storm Category 5 Regulator, this grip is the ultimate upgrade to dominate the speedsoft arena. Features Built in STORM Category 5 Regulator with forward facing gauge (60 180 PSI Range) Storage space for battery and airline. Convenient toolless