Ultra-light Harris Bipods are lightning quick and quality manufactured with heat treated steel and hard alloys. These adapters allow you to match any Harris Bipod to your favorite firearm. Some of these adapters will require minor stock or fore end inletting for proper fit. Adapter only, see below for fit/application. Bipods sold separately.FeaturesFor American Size Rails5/16a ^2 across rail slotSlides into 5/16a ^2 rails and locks into place with a set screw