Nikon A-Series Base BAR by Nikon Optics now offers the Nikon A-Series Base BAR. The Nikon A-Series Base BAR rings are specifically designed for lighter weight rifles. The Nikon A-Series Base BAR rings are extremely strong for the size and weight and will handle all the recoil of a magnum chambering. The Nikon A-Series Base BAR rings have a full recoil slot width that makes for a larger bearing surface. Summary The Nikon A-Series Base BAR rings are perfect for light weight rifles. The Nikon A-Series Base BAR rings are high strength with a large bearing surface to absorb even magnum recoil. Specifications and Features: Light weight Very strong Large bearing surface Aluminum construction 1 inch