Geissele SAG 6.5mm Suppressor Alignment Gage 10-448-F

Geissele SAG 6.5mm Suppressor Alignment Gage 10-448-F ensures the alignment of a suppressor to the bore of a firearm barrel, catching a misalignment problem most shooters never think to check for.

This Geissele SAG 6.5mm Alignment Gage works because a suppressor is usually much longer than the barrel-to-muzzle-device interface, so a small deviation at the mounting point translates into a much larger deviation at the suppressor's exit hole. Those small deviations can also compound rather than cancel out, making misalignment worse the farther down the suppressor's length it travels — worth checking on any 6.5mm precision build where accuracy is already the whole point.

Manufactured from hardened steel and ground 0.002" under nominal bore diameter, this Suppressor Alignment Gage is finished straight to 0.001" over its full 17" length. That length is what does the actual aligning work — the gage's own straightness carries the alignment check down the suppressor's full length rather than relying on an overly tight bore fit. Geissele hardens the SAG specifically so it resists wear from abrasive powder residue and won't pull burrs if it contacts misaligned baffles inside the suppressor.

Key Features:

• Approximately 17" length, 6.5mm caliber
• Hardened steel construction
• Ground 0.002" under nominal bore diameter
• Straight to 0.001" over its entire length
• Resists wear from powder residue and baffle contact
• Identifies complete pass, partial failure, and complete failure conditions
• Black finish
• Made in the USA

This gage turns a guessing game into a verifiable check, catching suppressor misalignment on a 6.5mm platform before it becomes a baffle strike.