M1 Garand Rear Sight Cover Single Rib - New - Replacement1New production M1 Garand Rear Sight Covers. Covers have the SINGLE rib which was seen on early SA and WRA rifles as well as Post WWII Rifles made by SA, WRA, IHC and HRA. Grey Zinc Parkerized finish is appropriate for lighter color rebuilds and Vietnam Era Depot refurbish Rifles. Select quantity needed when adding to cart. Sample from actual covers pictured.