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A baffle strike on a .408 caliber suppressor is an expensive day at the range, and the frustrating part is that most strikes are completely preventable. The trouble is that a suppressor sits way out past the muzzle, so even a tiny bit of misalignment at the barrel threads or mount gets magnified by the time you reach the end cap. Worse, those small errors can stack on top of each other. Thread alignment, muzzle device fit, and mount tolerances all add up, and by the end of a long can you might be a lot closer to a baffle than you think. The Geissele .408 Suppressor Alignment Gage takes the guesswork out of it. Slide the rod through the bore with your suppressor mounted, and you can see at a glance whether the bullet path clears every baffle and the end cap with room to spare.
Geissele machines this gage from hardened steel that is precision ground to 0.002 inch under nominal bore diameter, which gives it a snug, accurate fit in a .408 bore without binding. The outside diameter is finely finished and straight to within 0.001 inch over the full length of the rod, so what you see at the muzzle end is a true picture of your bore axis. The hardening matters more than you might think. Powder residue is abrasive stuff, and a soft rod can pick up embedded grit or pull burrs if it contacts a misaligned baffle. This one shrugs all that off and stays accurate through years of use.
The long length of the gage is what makes it work. It registers on the bore itself, not just the threads, so it reveals the true relationship between your barrel and the suppressor hanging off the end of it. Check alignment whenever you install a new muzzle device, swap mounts between rifles, or put a fresh can on a big bore precision rig. Thirty seconds with this tool made in the USA can save you a suppressor repair and a ruined range trip.
With the firearm unloaded and the suppressor mounted, slide the gage down the bore from the chamber end until it passes through the suppressor. Since the rod is ground just under bore diameter and registers on the barrel itself, it shows the true bullet path. Look for even clearance around the rod at each baffle and the end cap. If the rod contacts or crowds one side, you have a misalignment issue to sort out before firing.
This version is ground specifically for .408 bores, so it needs that bore diameter to register correctly and give you a meaningful reading. Geissele makes the SAG in several other sizes including 5.56mm, 6mm, 6.5mm, 6.8mm, 7.62mm, 9mm, .375, and .50, so grab the one matched to your barrel. Using an undersized rod in a larger bore will wobble and give you a false reading.
Bores and suppressors are full of abrasive powder residue, and a soft rod can pick up embedded particles or develop burrs if it brushes a misaligned baffle. Either one ruins the accuracy of the tool and can scratch your bore. Geissele hardens the SAG so it resists wear and stays true, which means the reading you get years from now is as trustworthy as the day you bought it.
Any time something changes at the muzzle. That means a new suppressor, a new muzzle device or mount, moving a can between rifles, or after remounting following a deep cleaning. Small tolerance errors stack up at the mounting interface and get magnified over the length of the can, so a quick check with the gage is cheap insurance against a baffle strike.
| UPC | 817953029725 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 10-1640-F |
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