I have an SWR Trident 9mm with an LCD for my Sig P226 Combat and a three lug mount for my SBR AR in 9mm with a 5” Tros 9mm barrel.  

With the trident mounted on my SBR it is dead-on.  The point of impact is the same with or without the suppressor.

When I have it on my Sig the shots are 8 inches low at 25 yards.  I have taken the LCD apart at the range and rotated the piston in the mount body to all 6 positions and it does not move the point of impact.  

The barrel on my Sig is the original and came threaded.  What is the problem?

Happy Thanksgiving!!

i have exactly the same issue with my P226 and Trident combo...i have to intentionally aim at the top of the target stand at 25 yards to hit in the center. I also have the sig factory threaded barrel (in my case it's their 1/2 x 28 aftermarket SIG barrel). The stock barrel is dead on at 25 yards.

I'm not sure their is a fix for this....other than different sights!

Would love to know how others have overcome it.

d