Monk Customs presents - CSG! The first HPA only gearbox out there. With the split gearbox design doing maintanence on your HPA engine is no longer a hassle, Just remove your upper and you are able to service your HPA engine without removing the gearbox from the lower receiver and having to unscrew your grip.
Doing work on your trigger is also a breeze! By removing the lower plate you are able to work on your trigger without losing the alignment of your HPA engine.
Next to that the CSG also has the following innovative features:
