Accu-Tac, Sled Feet, Anodized Finish, Black Color, Fit all G1 or G2 Accu-Tac Bipods Materials: 6061 Aluminum Alloy -stainless steel Hardware Weight: 3.8 oz Color: Flat Black Coating: Type III ( MIL-SPEC ) Hard Anodize The Accu-Tac Sled Feet are perfect for F-Class users, and soft or flat terrains. The Sled Feet are compatible with all Accu-Tac bipods. They are screwed in and come with the needed hardware for any G1 or G2 bipod models.