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CowCow A02 Steel Thread Adapter for Hi Capa
COWCOW Technology - 4.3 Threaded Outer Barrel Full CNC machined with Stainless Steel material. .45 marking engraved on the side of Barrel. The inter threaded design is compatible with M11 threaded adapter (
COW COW A01 Barrel Extender Adapter For Hi-Capa (11mm CW to 14mm CCW) (Gold) | eBay