Fit for Hi-Capa 3.8/4.3/5.1 Gas Blow Back Series(GBB) Magazine. Also fit to WE M4 / SCAR Series Airsoft GBB Rifle O-ring for better air sealing. Replace the standard Magazine Filling Valve of Magazine.
Item Weight(Gram) : 0.1 Major Color : Silver and Gold Over All Diameter : 7mm Over All Lenght : 15mm Manufacturer :WE
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