Click to expand Tap to zoom KWC M1911 CO2 Magazine Output Valve (Part #U12) by KWC Save Liquid error (snippets/product-badge line 32): Computation results in '-Infinity'% $17.99 SKU KCB76AHN-U12 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart A replacement outlet / knocker valve for the KWC M1911 blowback pistol magazine.