The insert is part of a Modular Headspace Comparator system and requires the separate purchase of the Modular Headspace Comparator Body.
Made from 17-4 Stainless Steel for durability and corrosion resistance, the insert is designed for precision in measuring cartridge headspace and bullet sizes up to .338 Lapua Magnum.
Produced by SHORT ACTION CUSTOMS, LLC., this insert is a new, improved version of their previous dedicated Headspace Comparator, offering enhanced accuracy for 30 Caliber (.308) cartridges.