The Modular Headspace Comparator Inserts require a separately purchased Modular Headspace Comparator Body.
These new Modular Design Inserts are precision machined from 17-4 Stainless Steel for durability and corrosion resistance, suitable for cartridges up to 338 Lapua Magnum.
SHORT ACTION CUSTOMS, LLC. produces the highest quality headspace and bullet measuring tools, including the 6mm x 40° w/.273" neck Modular Headspace Comparator Insert.