Upgrade spare injection valve for GBB Handgun magazines.

Enhanced black nickel plating finish!
The black finish will blend in with the pistol color, and your magazine will look a lot more like the real gun magazines.
Exchange with the worn out original injection valve with gas leaking problems.

Compatible Models:
Tokyo Marui, Maruzen,
Any handgun magazines withΦ5mm injection valve
(there may be some models that is not compatible )
Also compatible with Tokyo Marui GBB M4A1 MWS