Free Shipping & Free Returns*

FREE SHIPPING on Over 250,000 Products

Shop now and get Free Value Shipping on most orders over $49 to the contiguous 48 states, DC, and to all U.S. Military APO/FPO/DPO addresses.

Enjoy our FREE RETURNS

We want to ensure that making a return is as easy and hassle-free as possible! If for any reason you are not satisfied with your purchase, simply return the item within 30 days of receipt, and we'll cover the cost of return shipping. Learn more about our Return Policy.

Shopping Cart
Customer Reviews
Helpful Positive Review
Steel is the Best Gage. by Bob, Verified Owner, March 26, 2024
These are hardened, precision ground steel rods. Straight to +/- 0.001" over entire 17" length. Don't settle for the carbon fiber rods at +/- 0.003" straightness. Not Good Enough. These Geissele rods are best.
1/2 found this helpful
Helpful Negative Review
not very tight tolerance and expensive. by wes, Verified Owner, August 29, 2023
For something that my suppressor relies on, it’s unacceptable. Perhaps it was improperly machined? But the diameter is too small and has too much play to have a good estimate on suppressor alignment.
1/1 found this helpful
Most Recent Reviews
9mm suppressor alignment rod by Ross, Verified Owner, December 17, 2025
I have three of Geissele's alignment rods, and they are all worth it. You can look down the receiver and barrel and see a terrible misalignment, but it does not take much of a misalignment for a bullet to strike the end cap. Some of those are removab...
Read More...
Most Recent Reviews
Geissele SAG is great tool by Hawkeye, Verified Owner, December 30, 2024
The Geissele SUG arrived in Optics Planet shipping box in perfect condition. The gage confirmed minor suppressor misalignment on my 350 Legend. Also confirming my carbon crossbow bolts are very straight. Excellent machining and finish on this tool!
Most Recent Reviews
Excellent as expected by Fullassault, Verified Owner, April 12, 2024
Expense but not as expensive as a new suppressor. Easy to use, well packaged.
Read All 5 Reviews

Huge Savings on ALL Geissele Products

Blazin' Deal
Prices have been cut drastically on this product as part of a special offer. These prices are so low that there's no double-dipping with coupons or any additional discounts, but you'll still get the best deal out there. This offer won't last long, so don't miss out!
Show In Stock Only
7 Models Available
Weight
All
Search
Purchase Restrictions Purchase Restrictions

Product Info for Geissele Suppressor Alignment Gage

The Geissele Suppressor Alignment Gage(SAG) is a precision gage used to verify the alignment of a suppressor to the bore of a firearm barrel.It is important to understand that the length of the suppressor is usually much longer than the length of the barrel / muzzle device / suppressor interface geometry. A small deviation at the mounting interface means a much larger deviation of the suppressor exit hole. The deviations from nominal can also be additive which compounds suppressor misalignment.image

WARNING: California`s Proposition 65

Specifications for Geissele Suppressor Alignment Gage:

Manufacturer: Geissele
Width: 1 in
Condition: New

Package Contents:

  • Geissele Suppressor Alignment Gage

Geissele Suppressor Alignment Gage Orderable Models

List of Orderable Models

  • Geissele Suppressor Alignment Gage, 9mm, 10-451-F , MPN: 10-451-F , UPC: 817953028452 , Code: 1TO-GS6-GSAGG-10-451-F
  • Geissele Suppressor Alignment Gage, 6.5mm, 10-448-F , MPN: 10-448-F , UPC: 810081131827 , Code: 1TO-GS6-GSAGG-10-448-F
  • Geissele Suppressor Alignment Gage, 6mm, 10-1642-F , MPN: 10-1642-F , UPC: 810081131810 , Code: 1TO-GS6-GSAGG-10-1642-F
  • Geissele Suppressor Alignment Gage, 5.45mm, 10-1345-F , MPN: 10-1345-F , UPC: 810081130929 , Code: 1TO-GS6-GSAGG-10-1345-F
  • Geissele Suppressor Alignment Gage, .408 Caliber, 10-1640-F , MPN: 10-1640-F , UPC: 817953029725 , Code: 1TO-GS6-GSAGG-10-1640-F
  • Geissele Suppressor Alignment Gage, .50mm, 10-1641-F , MPN: 10-1641-F , UPC: 817953029732 , Code: 1TO-GS6-GSAGG-10-1641-F
  • Geissele Suppressor Alignment Gage, .375 Caliber, 10-1639-F , MPN: 10-1639-F , UPC: 817953029718 , Code: 1TO-GS6-GSAGG-10-1639-F

Geissele Suppressor Alignment Gage Unavailable & Discontinued Models

List of Unorderable Models

  • Geissele Suppressor Alignment Gage, 6.8mm, 10-449-F , MPN: 10-449-F , UPC: 817953025185 , Code: 1TO-GS6-GSAGG-10-449-F
Compare (0)