Changing rear sight on Glock


December 16, 2010, 03:08 PM
The standard plastic rear sight on my G19 got loose, and so I called Glock and they sent me a replacement. It is the standard plastic sight.

Do I need to drift the sight into the dovetail from right to left, left to right, or does it matter?

If you enjoyed reading about "Changing rear sight on Glock" here in archive, you'll LOVE our community. Come join today for the full version!
December 16, 2010, 03:41 PM
It does not matter.

December 16, 2010, 05:22 PM
Glock installs them left to right...

December 16, 2010, 07:02 PM
I use an MGW sight tool to do my Glock sights. The directions are specific and in bold, tell you to install the new sights from the right, pulling them into the slide from right to left. They also tell you to remove the old existing sight by pushing them out to the right.

I dont know if there is a taper there or not, but the couple I've done, I did as directed, and all was good, or at least, installation wise. Removal wasnt as pretty.

The couple that I removed, came out hard and in both cases, the original plastic sight was destroyed, leaving a little metal wedge/shim behind, that I had to knock out with a punch. Im accustomed to installing the metal sights, and understand how to "fit" them if they are tight. Im not sure how you would do that with the plastic ones, or what will happen if they are overly tight and you try to pound them in.

The sight tool is worth the money if you have a couple of guns and if you like night sights. It also works well for adjusting the rear sight for windage, and allows for more precise adjustments with no damage to the sight.

Red Cent
December 16, 2010, 07:22 PM
What AK103K said. G34. Changed sights. Have changed a number of other gun sights. Most all bevels cut for front and rear sights are tighter on the left. Always drift the sight out to the right and insert on the right side and drive to the left. On new sights, never file/sand/pound the barrel/receiver. Remove extra metal from the bottom of the sight for fit.. Sandpaper and a very flat surface(glass plate) works great. My G34 rear sight ws a little loose. I took a sharp punch and made two very small indents on each side of the bottom of the bevel. This will make a mini volcano and will seize the new sight.
Removing the plastic sights. Vise up the pistol receiver very rigid. No movement. I use a piece of thick leather belt. Find something metal with a flat nose that will fit within the side footprint of the sight. With a regular or heavier hammer, give the sight a good solid hit. No wuss tap. The worst will happen is that the sight will hit the floor. My plastic sight is in one piece. Once fitted, the new sight can be tapped in as easy as you want.

December 16, 2010, 09:23 PM
Thanks for the info...

While I am at it, how do you change the front sight on a Glock?

dogtown tom
December 16, 2010, 09:29 PM
Balrog Thanks for the info...

While I am at it, how do you change the front sight on a Glock?
Which type?
Some were staked in place, newer ones screw in.

December 16, 2010, 09:33 PM
My G19 is a few years old. How do I tell if the front sight screws in or not?

dogtown tom
December 16, 2010, 09:47 PM
Look on the underneath side of the slide.

A "screw in" will have a little hex head screw. You'll need a front sight tool to replace the old sight and install the new.

If it staked in place you'll just yank it out.:D

December 16, 2010, 09:54 PM
This is what the tool looks like. There are a number of makers, but most I've seen look like this...

Check out YouTube. Im sure you'll find a bunch of videos on the subject.

Hk Dan
December 16, 2010, 10:02 PM
The stake is no bigger than a good sliver. Look for a split in the sight bottom, and the stake will be buried in there. Alternately, if the sight is to be discarded, you can put a thin punch on the base and punch it out if it's plastic.

The nut on the front sight is a 3/16" and requires a thin walled socket on most models. The Brownell's tool works REALLY well, and it's cheap. Well worth the purchase.

Drifting in factory replacement sights without a pusher is a piece of cake. Some sights require filing to fit, but factory ones are loose as a goose and go in easy with a nylon punch and some loving lil taps.

Good luck, man!

December 16, 2010, 10:31 PM
I always just used a vice with a nylon punch, just pad the vice and make snug not tight. I also found a little break free one drop on the slide helps with install.

I never really liked the pusher tool, but to each his own, they do work. I had a Glock sight get a little loose so I used a very small amount of red loctite. It was on a 17 so no problem but if you are using a larger caliber might not work.

December 16, 2010, 10:34 PM
Small needle nose pliers work good with the front screw

If you enjoyed reading about "Changing rear sight on Glock" here in archive, you'll LOVE our community. Come join today for the full version!