Another M1 Carbine rear sight question - mine doesn't fit

Status
Not open for further replies.
W

whatever

Member
Joined
Jul 20, 2004
Messages
298
So I decided to buy the m1 carbinerear sight from Brownells. Here's a pic of what came in the mail:
IMG_20111205_210944.gif

I was excited to to put the sight on my rifle. My "canvas" looks like this:
IMG_20111205_210811.gif

Much to my dismay, when I tried installing the sight it just kept going...it finally stopped WAY to the left:
IMG_20111205_211031.gif

Here's about what I figured it should look like when centered:
IMG_20111205_211050.gif

When measured it looks like it measures about 22.5 mm:
IMG_20111205_211253.gif

Was the part I ordered incoreectly marked, is the part where the sight slides in (sorry, don't know the name of the part) out of spec, is the oart correct and I need to shim it somehow??

Any help would be appreciated.
 
Its called a dove tail or tailed. As for fixing it? Im not sure. Loctite

Old feeler gauges make great shims
 
Last edited:
See all those punch marks in your second pic? That is where the military put in a sight and then staked it in place. I would tighten the slot with some very careful peening, clean everything to complete dryness, then use some blue Loctite as I installed the sight. Don't think I would stake the new sight, as you might want to get it out later.
 
Maybe knurling the flat surface of the dove tail on the new sight + a lil loctite
 
Use a punch to dimple the bottom of the new sight, that should take up the needed clearance. I would not hammer on the M1 receiver. Pretty common to have to do this with dove tails.
 
To those suggesting loctite:

Are there any preferred installation methods using loctite? smear it on the bottom of the sight/receiver, center it, and let it dry? How durable is this method?

What if I want to remove the sight later on? Is the loctite bond breakable with a mallet? with the application of heat?
 
Loctite breaks down from heat. If it was me. I would go buy a feeler gauge set. Find the right gauge & use it as the shim. They trim up pretty easily to.
You can try loctite It may hold it in place. Even with a shim I would put a drop of Red loctite on all surfaces.
You can flip the new site upside down in a vice & wrap it 6 or 7 times with a center punch & hammer. If you raise the flat surface on the dove tail enough. You should get a nice tight fit.

When the fit is right. you will have to tap the sight genitally into place. You will want to do this with a brass, bronze or wood dowel rod
 
Last edited:
Status
Not open for further replies.

Similar threads

P
  • Locked
M1 Carbine rear sight questions
Replies
2
Views
2K
dfariswheel
D
L
  • Locked
M1 Carbine Rear Sight Assembly
Replies
5
Views
507
lencac
L
4
  • Locked
M1 Carbine rear sight question
Replies
1
Views
449
hps1
hps1
D
  • Locked
M1 Carbine Rear Sight Loose
Replies
4
Views
1K
dscottw88
D
The Grand Baboon
M1 Carbine Rear Sight Drift and Sight Picture
Replies
10
Views
544
GBExpat
GBExpat
Back
Top