The #12 Slot Blank is used when the rear sight is removed from a barrel. This is often needed when a receiver sight is installed, as the factory rear sight may be visible in the sight picture. Fits into standard 3/8" dovetails.
Set includes two post-type inserts, (.050 and .100 wide), one bead insert (.062) and five aperture-type inserts, (One plastic insert with .120 hole and four steel inserts with .093, .102, .110 and .120 holes).
