M1 Garand Rear Sight Base M14 M1A - New - ReplacementM1 Garand Rear Sight Base. These are new production and excellent quality parts. Sight Base is same for M1 Garand M1A and M-14 Rifles as most rear sight parts are the same. Made to spec so works great with USGI windage knobs and compatible with all makes of M1 Garand and M14, SA, HRA, IHC and WRA. Several available so select quantity needed when adding to cart.