$135.00
1 in stock
Online inventory may differ from in-store availability.
Quick turnaround so you get your gear sooner.
Trusted checkout with industry-standard protection.
Keeping Traditions Alive Since 1953
Secure Transactions provided with 
A baffle strike is one of those mistakes you only need to make once. Between the barrel threads, the muzzle device, and the mount geometry inside the can itself, there are several places where tiny errors can stack up. And because a suppressor hangs well past the muzzle, a small deviation at the mounting interface becomes a much bigger deviation at the endcap. The Geissele 6mm Suppressor Alignment Gage exists to catch that problem before your first shot does. Drop the rod down the bore of an unloaded rifle with the suppressor mounted, and you can see exactly where the gage sits relative to the baffles and exit hole. Centered means you are good to go. Touching a baffle or crowding one side of the bore means something in the stack needs attention.
This is not a piece of cut-off drill rod. Geissele grinds the gage 0.002 inch under nominal bore diameter, which testing showed is the sweet spot for fitting the widest range of real-world 6mm barrels while still giving a meaningful reading. The outside diameter is finely finished and held straight to 0.001 inch across its full length, and the long body is what indexes the rod to the bore, so you do not need a sloppy-tight fit to get a trustworthy result. The steel is hardened too, so powder fouling will not chew it up, it will not pull burrs if it brushes a misaligned baffle, and grit will not embed in the surface and turn your gage into a lap.
Check alignment any time you install a new muzzle device, swap a suppressor between rifles, re-torque a mount, or pick up a new 6mm barrel, whether that is 6mm ARC, 6 Creedmoor, or a 243. Always work with a verified unloaded firearm, and clear the bore of any obstruction after gaging before you shoot. It takes about a minute, and it is a whole lot cheaper than a trip back to the suppressor manufacturer. Made in the U.S.A. by Geissele Automatics.
With the firearm verified unloaded and the suppressor mounted, slide the gage down the bore from the muzzle end until it passes through the can. The long rod indexes off the bore itself, so you can look at where it sits relative to the baffles and endcap opening. If the rod is centered, your alignment is good; if it touches or crowds one side, track down the issue in the threads, muzzle device, or mount before firing. Always confirm the bore is clear of obstructions afterward.
Barrel bore diameters and straightness vary more than most people realize, so Geissele found 0.002 inch under nominal is the size that fits the widest range of 6mm barrels. The rod's long length is what aligns it to the bore, so a very tight fit is not needed for an accurate reading.
Yes, this gage is sized for 6mm bores, which covers cartridges like 6mm ARC, 6mm Creedmoor, 6 GT, and .243 Winchester. If you run a different bore size, Geissele makes SAGs in 5.56, 5.45, 6.5mm, 7.62, 9mm, .375, .408, and .50 as well.
Geissele hardens the SAG so abrasive powder residue will not wear it down, it will not pull burrs if it slides against a misaligned baffle, and grit particles cannot embed into its surface. A soft rod that picks up wear or embedded grit stops being a reliable reference and can even scratch your bore. The precision grind and 0.001 inch straightness are what make the reading trustworthy.
| UPC | 810081131810 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 10-1642-F |
You must be logged in to post a review.
Reviews
There are no reviews yet.