Replace rear sight base

[BVZ24]

Working on what could be best described as a resto-mod 2a1, starting from a barreled action. I didn't catch this cut rear sight until after I had invested the cash in the rest of the work. It looks deliberately and unprofessionally cut, for an unknown reason. It may have been done to fix a shooting low problem, but would mess up the rest of the range settings on the leaf.
How difficult are rear sight bases to replace? It sounds like you hammer the pins out, hammer both sights off, and then the same in reverse. Are rear sight bases generally individually reamed, or will any rear sight fit fairly easily?
I already have a replacement on order.

https://ibb.co/xGM1z5H

Information

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[Homer]

I’ve found they can vary in size marginally.

[Alan de Enfield]

I’ve found they can vary in size marginally.

And to take up any 'slop' they are commonly silver-soldered in place, so, you could need some heat to remove it after the pins have been removed.

[BVZ24]

Blow torch hot?

I might be better off with a new barrel. I can find used barrels, but no guarantee the rifling is any good.

[browningautorifle]

I might be better off with a new barrel.

Agreed, you never quite know what you're getting otherwise and if you can get one, do it.

[Alan de Enfield]

Blow torch hot?

I might be better off with a new barrel. I can find used barrels, but no guarantee the rifling is any good.

Melting temp of silver solder is 1145 degrees F (618 C) but you should start to get some movement at lower temps as it starts to soften.

If, once the pins are removed, it does not want to come off, then it might just be a "sweated fit" rather than silver soldered so try a gentle application of heat anyway to expand the metal.

[CoatiMundi]

I have some sight bases and sights if you need one. I can send them for the price of shipping.

[BVZ24]

Thank you for the offer. I have one ordered from numrich, but I can let you know if it is unserviceable.