Shop › KNS CZECH VALVE 556 BREN 2 KNS CZECH VALVE 556 BREN 2 $140.00 KNS Precision, Inc. Czech Valve, Gas Reduction Plug, Fits CZ Bren 2 556, Matte Finish, Black, Will Not Fit 8" 5.56 KNS-CZ-V556 Quantity: Add To Cart Added! KNS Precision, Inc. Czech Valve, Gas Reduction Plug, Fits CZ Bren 2 556, Matte Finish, Black, Will Not Fit 8" 5.56 KNS-CZ-V556