This large version of our Kit Carson's Hawken rifle sight is intended for a barrel up to 1-1/8" octagon and is ideal for our Jim Bridger Hawken rifle parts. Tall, to reduce heat mirage, the center notch is indicated. Wax cast steel, made in the U.S.A., the dovetail is about .376" long and .625" wide. Dovetail to a depth of .050".