Anybody replace a RRA NM front sight with a windage adjustable FSB
I have a RRA NM and I would like to mod the front sight block to be windage adjustable like the WOA uppers.
Looks straight forward enough to mod the front sight block itself, but since the barrel is set up for the taper
pins it looks like it would have to be modified in some way to povide something for the set screws to bear against.
Has anyone done this mod to a RRA NM??
I've done that before. Remove the taper pins. Drive off the front sight base. Drill and tap the four pin holes to accept 8-32 X 3/16" set screws. Install.
The flats machined on the barrel would be nice but not necessary. Just screw down the set screws snugly and you're done. Locktite isn't needed and would only make it harder to loosen and adjust.
Been there and done that. Local gunsmith charged $50 to mill flats and modify FSB. No biggie.
Thanks....
Mainly I was wonder how you could mill the flats where there are holes through the barrel for the taper pins.
Put the taper pins in the barrel and grind them to the contour of barrel, then machine the flats.
Thanks, but still not sure I see how that works.....seems like the set screw pressing on the small end
of the taper pin would push it out. Guess I'll just have to try it.
You will have another set screw on the other side of the pin. As you loosen one screw, you tighten the other to adjust windage. In other words, You will have 2 set screws for the pin.
Thanks Bubba....actually I get that....but it still seems that the sight would be able to rotate if the taper pins
can move....I must be overcomplicating it in my head.....;)
Originally Posted By 1bayouboy:
Thanks Bubba....actually I get that....but it still seems that the sight would be able to rotate if the taper pins
can move....I must be overcomplicating it in my head.....;)
The set screws have a major diameter larger than the pin holes. That is why you do not have to fill in the pin slots on the barrel (they are slots, not holes). The set screws will bear against the barrel and do not need flats machined on the barrel. This will give a more than firm locking of the front sight base onto the barrel (this isn't a major load bearing assembly. All it does is hold the front sight in one place).
Now that makes sense......thanks
