Adding a side weight to Accuracy International’s AT-X rifle provides enhanced stability to the entire set up and places the centerline of the bore as close to the bag as possible. This causes a straighter recoil impulse and reduces the jump of the reticle. These weights are stackable, and provides more contact with the bag. Specifications: Weight: 8 ouncesDimensions: 3 1/8" x 1 1/4" x 1/2" Accuracy International AT-X Keyslot Steel Side Weight 009-1003