sight dovetail sizes The rear dovetail size is .570" and the front dovetail size is .350". Topics: Products_KitsTags: Southern|Rear Sight|SightsLast verified: 2026-08-17Also called: southern mountain rifle, southern mountain, mountain rifle, southern, smr, rear sight, rearsight, buckhorn, buckhorn sight, open sight, open rear sight, notch sight, sights, sight, sight set