Sidearms & Scatterguns Question on measurement of Sig P226 front sight.

[c1steve]

My P226 in 357 Sig is accurate, but after installing a Bar-Sto 9mm conversion barrel, it shot 5.5" low at 25 yards.

When I first called Sig tech support, they were not very helpful, but Bar-Sto determined that the OEM barrel did not fully match the standard Sig barrels. I was told Sig installed sights to match the barrel.

The front sight is stamped "8", but I measure it has .203". I am measuring this front the dovetail to the top of the sight. Can someone look at the image, and tell me if I am measuring this correctly? If I am measuring correctly, then it appears that the sight is "mis-marked", probably to cover up a poorly machined barrel.

The rear sight is stamped #8, and measures correctly.

Note this list of Sig 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)

Also, For 9mm and .40, the norm is a #8 rear and a #6 front
For .357 SIG it's a #8 rear and a #8 front.

 

[Rhys]

The top of the sight has a bit of a slope to it, and measuring that way it's awfully easy to tip the caliper inducing error in the measurement.

 

[c1steve]

I have measured it many times, and usually come up with .203". I may have to remove the sight and use the calipers, but was hoping to not go that route.

Post: I just ordered the MGW sight tool. This way I will have all the facts needed, so the Sig customer service will not be able to BS me.

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