Shop › KNS AR/MCX STOCK ADAPTER W/OUT FLNGE KNS AR/MCX STOCK ADAPTER W/OUT FLNGE $51.00 KNS Precision, Inc. Stock Adapter without Flange, Fits AR-15, Converts Buffer Tube to 1913 Rail, Matte Finish, Black AR-MCX Adapter w-o Flange Quantity: Add To Cart Added! KNS Precision, Inc. Stock Adapter without Flange, Fits AR-15, Converts Buffer Tube to 1913 Rail, Matte Finish, Black AR-MCX Adapter w-o Flange