FCW M4 Adapter For Toystar K-1A / K-7 Material: ABS PolymerOnly for Toystar K-1A & K-7 (not fit to K2)FCW M4 Adapter For Toystar K-1A / K-7SKU: FCW-ADAPTER-M4K7$42.50PriceQuantity*Only 2 left in stockAdd to CartBuy Now