At the website for gunpartscorp.
.780
You wil have to call S&W with the specifics of your 629
the ranger Mod 34 was made by Marlin mod 65 e-GunParts.com
The front sight is called "the front sight."
Model 80 1934 to 1939 Model 80-E 1934 to 1939 peep sight with hooded front sight Model 80-C 1940 to 1970 semi-beavertail forearm Model 80-DL 1940 to 1965 semi-beavertail forearm with peep sight
I'm assuming you mean the iron sights mounted to the barrel of the rifle? Elevation is adjusted by sliding the sight elevator front to back on the rear sight. Windage is adjusted by drifting the front sight left-to-right. If the gun is 'shooting to the left' tap the front sight slightly to the left. A very small movement will have a major change. You could also tap the rear sight slightly to the right to effect the same change. If the gun is 'shooting low', slide the sight elevator toward the rear to lift the rear sight leaf. Again, a very small change in adjustment will have a big impact downrange. sales@countrygunsmith.net
Windage is adjusted using the knob on the right rear of the carrying handle/rear sight mount. There are two elevation adjustments. For the purpose of zeroing the weapon in, you would raise or lower the front sight post as needed. The front sight base is marked with an arrow and the word "UP" - this refers to which direction you would need to adjust it to bring the strike of the round up - it actually lowers the height of the front sight post.
1. Remove the screw to the rear of the front sight ramp.2. Remove the "blade" from the front sight ramp.3. Remove the screw from the front of the front sight ramp (which was formerly seated under the "blade").
line up the target on the top of the front sight while sighting the front sight through the rear peep sight.
you do for a marlin or mossberg
Peep sight