This is a Lyman receiver sight blank, designed to fill the slot in the base once the sliding measurement scale is removed. This blank will fit Lyman 57 and Lyman 48 receiver sights. It is in NRA good to very good condition, with some finish edgewear, light scratches, scuffs, and minor dings to the metal.
We use the NRA Modern Gun Condition Standards Grading System for grading part conditions. You can read about it HERE
