Lyman #17AEU Globe Front Target Sight .464″ Height .360″ Dovetail

17A Target Sights are machined from a solid piece of steel and are designed to be mounted in 3/8″dovetail slots (except 17AEU which has a .360″ metric size dovetail). They are supplied with eight interchangeable inserts (see photo and description) that are locked in place with a threaded cap.