There are 2 most prominent concept in WBB hopup. The first one is the older and more well known conc..
Tappet Plate replacement unit for JM Gen 8/9 gearbox...
Black replacement parts for JM Gen.9 M4A1 blaster.-Muzzle-Bolt Release-Mag Release..
Standard stanag mag for JM Gen.9 M4A1. Comes with a ranger plate...
Standard nylon shell replacement for JM Gen.9 M4A1Comes with :- Delta Ring adapter- Mag Release- Fro..
T-Hop for JM Gen 9 gearbox...
Drop in trigger replacement for JM Gen.9..
Drop in replacement trigger for JM Gen.9..
Drop in replacement JM Gen.9 Nylon Gearbox. Does not come with motor...
Stock outer barrel replacement for JM Gen.9..
Stock wiring kit for JM Gen.9 gearbox...
This adapter enables you to mount M016 metal handguard to your Gen9 M4A1 receiver shell...
Standard metal gears set of 4 gears plus 1 anti reversal latch..
Metal buffer tube for M4A1 type blasters like JM Gen.9 M4A1 and Jing Ji SLR.Laser engraved with the ..
Nylon buffer tubeWorks with :- JM Gen.9 M4A1- LDT 416- SLR..
Nylon gear replacement for V2 or Gen.8 gearbox..
Preload kit designed for JM Gen 9 M4A1. Preload gels from mag reservoir to prevent dry firing...