Forster XL Comparator Body with Screw 50 BMG

The XL Comparator and corresponding bushings were made to fill a need for a tool that has the ability to do comparative head space and base to ogive measurements on larger calibers. In most instances a quality 8? caliper (not included) is required. The XL Comparator Body is used in conjunction with the Red XL Bushings (sold separate). The Body itself does have machined into it the .636? diameter for checking the 50 BMG Datum. Made In United States of America