Originally designed for the M1 Garand Rifle, this rear sight base will transform your Ruger 10-22 into a battle worthy rifle with all of the incremental elevation & windage measurements used by the G.I. The base has a concave bottom with 2 mounting holes. Plenty of extra steel to modify if needed for your custom gun project. Accepts the superior M1 Garand windage pinion & elevation aperture sold separately. Ruger 10-22- M1 Style Rear Sight Base. Can be used on many different guns.

May require some minor fitting depending on use.