GHK Gas Blow Back Conversion Kit.
Full Metal Construction.
Design for Convert your AEG Rifle to GBB Rifle.
Take Out AEG Gearbox then replace Gas Blow Back GBB BOX.
Suitable for All Tokyo Marui M4 / AR Series Airsoft Electric Gun AEG Rifle.
40 Rounds Loading Capacity Magazine.
Gas Test @ 20°C Room Temperature 350FPS / Above 30°C Room Temperature 420FPS.

Package Include:
1 x GBB Box Kit
1 x WA style GHK GBB M4 Magazine
1 x Hop-up Set
1 x Stock Tube Holder

NOTES: Modification might needed. please consult gunsmith / airsoft expert before installation

NOTES: Self-Installation & Modification (e.g. Sanding) is required. Please consult your local gunsmith / expertise for installation advise.


Built Material: Aluminum, Steel, Plastic
Major Color: Black, Gray
Weight with Box(Gram): 1036
Gearbox Over All Size: 180mm x 100mm x 25mm
Magazine Over All Size: 150mm x 65mm x 22mm
Gearbox Power (Muzzle Velocity): (Temp < 20C )350 FPS ; (Temp < 30C )420 FPS
Magazine Capacity: 40
Manufacturer: GHK