I changed front sights a couple years ago but didn't fire the carbine until this August. The old sight must have been on a little crooked because it now shot right - when I got lined up the aperture was at the center of the carbine but way left in the sight base. So I took the sight out and fitted it more left, just about on center. I put the aperture on my pencil mark which happened to be pretty much on center and went to the range. When I started shooting, the shots were still far right! I cranked and cranked on the windage knob to get on line, and the aperture was all the way left again! I didn't realize what had happened until I got home; I didn't get the sight tight enough in the dovetail and I must have bumped it getting it out of the safe. Anyway, it had traveled to the right again.
So, I took it out again, cleaned everything up, put some silicone rubber adhesive in the dovetail and set the sight again. Today I finally got around to shooting it again and everything is AOK. I had to make a minor adjustment (4 clicks) but that was within the range of the adjustable index plate so I was able to center it when I got home. Due to the sun shining on the target and my worn-out eyes, I could hardly see the 3" blaze-orange ball I put at the center of the target (100 yds) but still managed 20 shots in a saucer-sized circle more or less centered on the red bull. Like I told the guys at the range when we went down to get our targets "It ain't National Match shooting but that represents a dead Axis soldier" meaning any one of those 20 would have been a good head or heart shot.
So I'm finished with the sight episode unless I decide to stake the sight for good measure. I guess I will but not tonight! I also have been installing night sights on two .45 pistols and had to verify sighting on both of them today (went very well) plus I fired about 50 shots with an AR-15.
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