408 Caliber Suppressor Alignment Gage

The Geissele Suppressor Alignment Gage is a precision measurement tool designed to verify suppressor bore alignment relative to a firearm barrel. This 9mm variant features hardened steel construction ground 0.002 inches under nominal bore diameter, allowing it to fit most standard barrels without requiring an excessively tight fit. The extended 17-inch length naturally aligns the gage to the bore, compensating for small deviations at the suppressor mounting interface that would otherwise magnify at the exit. The hardened steel resists wear from powder residue and prevents burring when contacting misaligned baffles. The outside diameter is finished straight to 0.001 inches tolerance throughout its length. At half a pound, this precision tool accommodates typical variations in barrel bore diameter and straightness while providing reliable alignment verification for suppressor installations.