Sighting a fixed/installed sight SIG

[jadedone4]

Folks (especially Greg),

I had night-sights (Trijicons) installed on the SIG (P226) months ago; noticed that I am shooting left of center mass; with no change in stance, grip, etc. Also found that if I line-up three-dots "textbook" instructions, that shots are about 1.5/2.0 low. My assumption(s) are that the Trijicons are "universal" - made to fit either all weapons or a specific series of said manufacture's weapons - rather than built to spec's for specific weapons. Could be wrong there, not a techie - open to any assistance/knowledge anyone can provide. Question - can night-sights be adjusted accordingly..? I'd have to venture to guess that it requires some special SIG "tool" that an armorer would have, etc (don't believe that would be an issue as VAC/Robb installed and since I purchased there they didn't charge me a dime - don't mind paying for an adjustment, if need be, especially with that arrangment - VAC are stand-up guys).

Gave my weapon to an RSO with a full mag (15); he noted that I'd have to cover the bull's eye to get X-ring groups - his #1-#6 shots were in the 9/8 rings, but once "compensated" was dead-on in the X-ring.

Anyone else have this issue...? I know that there are specific sights for competition weapons; this is my daily SD carry, so for me good/great placement (center-mass) is paramount - however, exact placement (i.e. tactical "whistle-holes") is a little further down the road for me (after practice, practice and practice some more...).

[gregj]

It doesnt look like the Trijicon night sights come in different heights like the OEM sig sights. If they dont, I believe others do. The only way to adjust elevation is to replace the front or rear sight with a different number. Windage is easy to adjust by drifting the front or rear. The Sig tool makes it very easy. I'm going through resighting my 226 now.

Below copied from XDTalk.com:

Rear Sight Heights:

#4 = 5.24mm (0.21 inches)
#5 = 5.52mm (0.22 inches)
#6 = 5.80mm (0.23 inches)
#7 = 6.07mm (0.24 inches)
#8 = 6.35mm (0.25 inches)
#9 = 6.62mm (0.26 inches)
#10 = 6.90mm (0.27 inches)

Front Sight Heights:

#5 = 6.01mm (0.235 inches)
#6 = 5.88mm (0.230 inches)
#7 = 5.74mm (0.225 inches)
#8 = 5.60mm (0.220 inches)
#9 = 5.46mm (0.215 inches)
#10 = 5.32mm (0.210 inches)


A higher rear sight number (taller) will raise the point of impact, but a smaller front sight number (taller) will lower the point of impact.

Changing a front sight number by 1 will change the point of impact at 25 yards by about 1 inch. Changing the rear sight number by 1 will change the POI at 25 yards by about 2 inches.

[jadedone4]

Gregj - thanks for the information; I'll make sure to put it to good use (still learning on the SIG every day I shoot).