Nice looking rifle!!! Good find.
I am NOT an "x-spurt" on sights, but the rear sight may be a Red River hunting sight . . . just a guess. Not a clue what the front sight is.
My sights are Red River (back when they were Parts Unknown) and I am a bit familiar with MVA sights. Others will provide more enlightened info (and educate both of us in the process, I hope).