M1 Carbine Rifle Adjustable Precision Peep Kensight Rear Sight Fully Adjustable Windage and Elevation Sight Body is wire-EDM machined from a Solid Billet of Chrome-Moly steel Fine serrations for superior sight picture in all conditions Precise Modern-day recreation, WWII-Era Milled Adjustable Rear Sight Backed by our Kensight Limited Lifetime Warranty