The ski foot is made from 1/8" aluminum measuring 1 3/4" x 1" with 1/4" up turned front and back edges. This is the same base used in the Rubber Foot, and Spike Foot. This is designed to be used to stay on top of loose soil when the user needs to change positions quickly for multiple target engagements, or sustained automatic fire.

Shown here with optional adapter, installed on a bipod.