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  • How do you center your rear sight when installing sights?

    Posted by Mateo on November 13, 2021 at 1:28 am

    When I tap in the rear sight, I usually take some calipers and use the depth measurement on them to get the rear sight centered on the slide. This time I also used a bore laser to double check and found that I was slightly off and needed to tap the rear sight slightly to the right. I’m now .15 inch on one side and .12 on the other side. I won’t get to the range for a few days to actually check my zero but it made me wonder, does the theoretical midpoint of the slide equal an actual zero?

    Mateo replied 10 months, 2 weeks ago 2 Members · 1 Reply
  • 1 Reply
  • DirtyDee78

    Guest
    November 13, 2021 at 1:28 am

    To center it (not necessarily zero as another user said) – Measure rear sight, put a pencil mark on center. Measure slide, put pencil line on center. Match them up, erase pencil.

  • trivial_viking

    Guest
    November 13, 2021 at 1:28 am

    I literally use a toothpick and eyeball the center. I don’t measure anything.

    Dead on for me.

  • roughingupthesuspect

    Guest
    November 13, 2021 at 1:28 am

    no. From my experience you can zero the sight to the slide and it will be close or you can zero the sight to your eye and you will be on as long as you are using the same eye. The thing is that what is “centered” is not always “zero” and what is “zero” for you is not “zero” for me. I put it in the middle and center it by touch (using my sense of touch to see if it the same spacing on either side) and by eye so it looks centered. Then I shoot it and deal with the results. If you drift a rear sight to account for your eyes, stance, grip, physique etc. it throws it way out if you have to shoot weak hand. So get it close and shoot it a bunch to see if you can deal with your group. If not you have two choices. drift the sight and always hit center mass with that hand or shoot it a lot with it centered, and use Kentucky windage if its off one way or the other.. Unlike rifle sights you don’t adjust windage for long range so you are using experience and intuition to a good extent when trying to be accurate with iron sights.

  • psychonaut2285

    Guest
    November 13, 2021 at 1:28 am

    You don’t need to be concerned with perfectly centering the sight, you need to be more concerned with zeroing the sight. If that bitch is far right and your hitting your shots then that’s where it belongs. As I understand it a lot of people have to push their Glock sights to one side to get proper zero

  • Wyvern_68

    Guest
    November 13, 2021 at 1:28 am

    Digital caliper.

    I’m not trying to shoot for distance or anything, eyeballing it is usually good enough for me too.

  • Jmg0713

    Guest
    November 13, 2021 at 1:28 am

    Eye ball it, I generally don’t shoot very far with a pistol.

  • G19x2

    Guest
    November 13, 2021 at 1:28 am

    Get a caliper

  • Snowbroski

    Guest
    November 13, 2021 at 1:28 am

    I’ve never seen a laser boresighter that is properly calibrated out of the box, they tend to favor one direction and if you spin it in the barrel you’ll see the laser do a full circle on the wall.

    Just center the sights on the slide, and use a depth gauge to get it as close to center as possible. I’ve owned DOZENS of Glocks and I have installed and tested HUNDREDS of sights for myself and others and I’ve never seen a Glock that naturally favored left or right, It’s always been the shooter and poor grip/bad trigger control. Now the vertical zero is the one that is typically inconsistent, some Glocks will shoot higher than others, especially post 2020 Gen 5 Glocks and post 2021 Gen 3 Glocks.

  • zshguru

    Guest
    November 13, 2021 at 1:28 am

    Midpoint of the slide should be the zero, that’s what the front sight is aligned to.

    Yeah, what /u/Snowbroski said. I just use a depth gauge and try and get the sight centered. Is it absolutely dead center? Probably not.

    Does it matter? I don’t think it does. I think you’d only start to notice it somewhere past 75 yards or so. That’s about when holdover is a thing so perhaps if the rear sight is off that’s where you’d have to compensate as well?

    My shots go dead center 25 yards and in if I do my part and I can make hits out to 50 yards (with no holdover/compensation) if I do my part. That’s all I think I can ask my pistol to do.

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