GP100 rear sight pin moves under recoil

stump shooter · February 23, 2010, 10:25 PM

Each time I've been to the range with my GP100 the rear adjustable sight retention pin keeps moving out to the left after a few hefty rounds.

I can push it back and forth with my fingernail very easily although I have not been lucky enough for it to come out completely during fire.
All I can think of is to install a tighter fitting roll pin OR pulling the pin and squeezing one end to swage it for a tighter fit on it's entry side of the frame

Does anyone have any ideas otherwise?

Scorch · February 24, 2010, 02:18 AM

Push the pin out. Using a small ball peen hammer, slightly flatten one end of the pin. Reinstall the pin. If you are really worked up over it, put a small drop of blue LocTite on the pin as you reinstall it.

edward5759 · February 24, 2010, 02:14 PM

you can remove the pin, clean it and put thread locker, or locktite red on it.
it will stop the movement.
Ed

Scorch · February 24, 2010, 02:21 PM

Red LocTite will definitely stop the movement. Permanently. If you happen to bleed a little bit over to the rear sight itself, you will permanently bond the rear sight to the pin. That's why I recommend blue, but red will work.

edward5759 · February 24, 2010, 03:29 PM

The last thing you want to happen is to loose it.
blue works great, red will lock it.

Red locktite mixed with a drop of oil has worked well for butting barrels on recevers also.

a slight yaw bent into the pin, would cam it a little and prevent it from moving somewhat.

If you thingk you might want to change it in the future I would use Blue locktite.

I like red locktite though, I saved a lot of money on asprin with it.
.....
I put the stuff on my kids lips 30 some years ago. still works.

stump shooter · February 24, 2010, 07:31 PM

Wow! I was this >< close to mentioning a teeny film of red loctite on the ends as my third option but I was afraid I get the "never use loctite" lecture, LOL

I was considering the chance of bleed over into the sight itself. I may try the yaw or widening one end of the pin and tack it in place with some blue.

Thanks!

February 23, 2010, 10:25 PM	#1
stump shooter Member Join Date: March 23, 2008 Posts: 61	GP100 rear sight pin moves under recoil Each time I've been to the range with my GP100 the rear adjustable sight retention pin keeps moving out to the left after a few hefty rounds. I can push it back and forth with my fingernail very easily although I have not been lucky enough for it to come out completely during fire. All I can think of is to install a tighter fitting roll pin OR pulling the pin and squeezing one end to swage it for a tighter fit on it's entry side of the frame Does anyone have any ideas otherwise?

February 24, 2010, 02:18 AM	#2
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	Push the pin out. Using a small ball peen hammer, slightly flatten one end of the pin. Reinstall the pin. If you are really worked up over it, put a small drop of blue LocTite on the pin as you reinstall it. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

February 24, 2010, 02:14 PM	#3
edward5759 Senior Member Join Date: September 15, 2009 Location: Phoenix, AZ. 30 miles from water, two feet from Hell. Posts: 355	Also you can remove the pin, clean it and put thread locker, or locktite red on it. it will stop the movement. Ed

February 24, 2010, 02:21 PM	#4
Scorch Senior Member Join Date: February 13, 2006 Location: Washington state Posts: 15,248	Red LocTite will definitely stop the movement. Permanently. If you happen to bleed a little bit over to the rear sight itself, you will permanently bond the rear sight to the pin. That's why I recommend blue, but red will work. __________________ Never try to educate someone who resists knowledge at all costs. But what do I know? Summit Arms Services

February 24, 2010, 03:29 PM	#5
edward5759 Senior Member Join Date: September 15, 2009 Location: Phoenix, AZ. 30 miles from water, two feet from Hell. Posts: 355	YEA your right The last thing you want to happen is to loose it. blue works great, red will lock it. Red locktite mixed with a drop of oil has worked well for butting barrels on recevers also. a slight yaw bent into the pin, would cam it a little and prevent it from moving somewhat. If you thingk you might want to change it in the future I would use Blue locktite. I like red locktite though, I saved a lot of money on asprin with it. ..... I put the stuff on my kids lips 30 some years ago. still works.

February 24, 2010, 07:31 PM	#6
stump shooter Member Join Date: March 23, 2008 Posts: 61	Wow! I was this >< close to mentioning a teeny film of red loctite on the ends as my third option but I was afraid I get the "never use loctite" lecture, LOL I was considering the chance of bleed over into the sight itself. I may try the yaw or widening one end of the pin and tack it in place with some blue. Thanks!