XS Threaded Stem Long
XS SIGHT SYSTEMS - Long threaded ghost ring adapter
This stem replaces the standard stem on XS Sight Systems Ghost ring sights (as supplied with the Lever Rail, or on their own), and is threaded to allow the use of screw in apertures, for more accurate shooting.
This stem accepts Skinner Apertures (link).
The stem is 0.649" long, but can be cut down to standard length.