Rear sight adjustment on my Glock?

[aliasneo07]

Guys/gals. I'm irritated. Maybe its my OCD I don't know. But this is bugging me to death lol.

I just went and got some Trijicon night sights installed in place of my factory sights on my Glock 19. Front sight was a tiny bit crooked. Took it back to the gunsmith and he fixed it for me. Everything looks good, so I decide to take it to the range.

The sights are cool, but I'm shooting 2-3 inches left at 25 ft. Now I know when someone says that the first thing that comes to mind is "That's cause you suck." Well, I thought of that. But before, with factory sights, my shots were centered. Sure there was some variation. But now i'm getting EXTREMELY consistent and tight groups, they're just 3 inchest left of where i'm aiming. I tried bench rested as well. I'm far from an expert, but my technique I would say is decent. It just seems like the sights are off. But when I look at the top of the slide it looks centered in the groove. However I assume even 1/16th of an inch differencial could cause this.

So, what should I do? Am I going to be forced to shell out 100 bucks for an MGW sight pusher?

Thanks for the help, this is driving me nuts on my carry gun!

 

[kostyanj]

You don't need a sight pusher to adjust the sights on a Glock. Just take a non-marring hammer, and gently push the rear sight a little to the right.

 

[The Lone Haranguer]

The sight needs to be moved in its dovetail slot a little, in this case to the right (when viewed from the rear of the gun). Take it back to the smith and have him use his sight pusher. (The sight can also be moved with a hammer and punch, but I would not recommend striking a night sight.) It may take a couple of trips.

 

[Zerodefect]

Nice thing about Glocks is that it is super easy to do the sights yourself.

Just heat the sight setscrews with a soldering iron to loosen the tread lock, if your sights have screws. Back the screw(s) out a turn.

Hold gun in your hand/lap, not a vise. Hit sight over with a heavy hammer and a delrin (plastic) punch. As long as you don't overdo it the tritium vials will be fine. A pusher can kill the nightsights just as quickly, quicker IMO, than a hammer/punch.

Dribble red threadlock on the edges of the sight to lock it back in place. Wipe excess every 10 min. Let dry 24hrs.

 

[Spencer_OKC]

+1 for a slight shift of the rear sight to the right.

Then your OCD can be frustrated that the rear sight isn't centered exactly on the slide, but at least you'll be hitting your point of aim.

You paid the smith to put them on, let him fix them too.

 

[aliasneo07]

Well I'd hate to think i'd be adjusting for MY point of aim. I guess thats the way it is though. I'd hate to think i'm pulling my shots. If I am, I don't want the sights adjusted. I want them the way they came from the factory. And then I can adjust my SHOOTING around properly aligned sights. For combat handguns i'm not a fan of adjusting to the right just cause I shoot left. Hopefully its just that the sights are slightly off and its not me.

I think I'm gonna spring for a sight tool because its gonna take some real fine tuning and I'd end up going to the smith 10 times. Plus ill want some night sights on my G21 and my future G26. So that will save me a trip to the smith I guess. Is MGW the way to go?

Last question. I want to REALLY make sure that I'm eliminating me as a variable. What is the best tool to ensure that? A bench rest I would gather, but is there a particular type? I always just rest my hands on my gun case but that can't be optimal.

Thx

 

[Zerodefect]

I thought I put my XS bigdots right in the middle. I used a long ruller along the front sight to make sure it was straight.

But even with a bright light its hard to tell if your truely in the center or not. I had to drift my sight over 0.5mm until it was right. It still looks centered. The round sides of the Glock slide make things hard to see.

And the left over dovetail is hard to compare. When one side is easy to spot in the light the other is in a shadow.

Just use a ruler and move it no more than 1mm off.

 

[W.E.G.]

You paid the smith to put them on, let him fix them too.

This.

 

[AK103K]

All my Glocks shot to the left for me right out of the box with the rear sight centered. Every one is now adjusted with the edge of the rear sight even with the right edge of the dovetail cut.

I wouldnt go hammering on the night sights with a punch. The sights are usually pretty snug, and require some effort using that manner. Its also a lot harder to be precise in your adjustments. Even with a pusher, it can require some effort, but its a smooth, constant pressure, instead of a pounding.

I bought one of the MGW sight pushers for Glocks, and it works well. You dont have to take the gun apart to use it, and its easily done. My only complaint is it lacks the witness marks that their SIG tool has, which makes it a lot easier to zero up. The tool costs about $100, but you can usually recover the cost by selling your old night sights when you replace them.

Last question. I want to REALLY make sure that I'm eliminating me as a variable. What is the best tool to ensure that? A bench rest I would gather, but is there a particular type? I always just rest my hands on my gun case but that can't be optimal.

I always sight the gun in the way I intend to shoot it. If you normally shoot standing, I'd zero it that way. The group may not be as nice and tight, but it will be where your "natural point of aim" is, more or less.

 

[JDGray]

If the frt sight is off slightly to the right, it will shoot left. The frt sight is longer than the plastic factory sight, and can move in the oval hole. It takes some carefull tightning, to keep it centered. .030" will shift POI by 1.5" at 25' with a 6" sight radius. But every Glock I ever shot, hit left until I learned the trigger. You may just need to learn the new sights.

 

[aliasneo07]

K thx guys.

Didn't even think about the front sight being off....