APS "silver edge" airsoft gear box, version 2, 8 mm, rear wired

Description

APS "silver edge" airsoft gearbox, version 2, 8 mm, rear wired.
Never used or tested. I got in a mystery box, but I am not a tech. Will sell as is according to the pictures.
I am not a store. I can not accept returns. Will only ship to the continental US.
Features
Fully polished "Silver Edge" gearbox increase overall efficiency by up to 15% from standard gearbox designs
Made from high strength zinc alloy; reinforced in key areas for longevity
8mm stainless steel bearings provide smooth travel for the steel gear set
Ported cylinder optimized for carbine length inner barrels (~363mm)
Integrated "quick spring release" function for easy spring change
"Hybrid" electric blowback design (can be disabled simply by changing the mock bolt)
Wired to the rear with a Small Tamiya plug
Compatibility:
For APS ambidextrous M4 platforms (May work with other brand TM-spec M4 AEG rifles, but will require modification)
Gearbox Type:
Ver 2, Full Metal
Motor:
Long Type (Not included)
Manufacturer:
APS