This is a Zero Coil recoil reducer for bench shooting. It works by clamping to the bench and using springs to reduce felt recoil. This design allows one to still shoot in a conventional manner with only ⅝” increase in length of pull. The clamp and high friction undersurface ensures a steady and consistent shooting position. This device is best utilized with a tripod or bipod. Weight is 17 lbs. Comes with instructions and replacement springs. Our stock number is #A392. Willing to ship anywhere in the US, buyer pays freight and insurance.