Gunsmithing help

[870pumplover]

Just installed a new bead sight and it has to be filed down on the inside, what’s the best method of this ? Just a half rounded bastard file ?

Also the muzzle needs to be squared from previous owner who must of cut it down (its 22” now.

What’s the best way to get a even squared muzzle?

Cheers

 

[Butcherbill]

I’d lightly use a fine small half round file or dremel with a sanding drum if it was me, take a bit off at a time till it’s flush.