The insert is part of a Modular Headspace Comparator system and requires the separate purchase of the Modular Headspace Comparator Body.
It is designed for the most accurate cartridge headspace and bullet measurements, accommodating cartridges up to 338 Lapua Magnum.
Constructed from 17-4 Stainless Steel for durability and corrosion resistance, it represents the highest quality in headspace and bullet measuring tools.