APS Co2 Output Valve and Magazine Base Cap For APS ACP Black Hornet SHARK Co2 Pistols Airsoft MagazineAPS 2pcs Co2 Injection Output Valve And Magazine Base Cap For APS ACP Black Hornet SHARK Co2 Pistol Airsoft Magazine. Made out of metal. Replace the original magazine injection valve and base cap. Suitable for APS Co2 pistol standard magazine and Big Stick extended magazine. Weight Approx 46g Original Packing