k31 sight options

[JKosprey]

I'm thinking about changing the sights on my k31...preferably something that's reversible. I don't want to mount an optic- it's one of the only rifles I have that doesn't have an optic, and I'd like to keep at least one that way. I've seen the Mojo sight (which seems to be a good option for close range but not so much for precision) and the diopter sights, which look incredible, but are more than I'd like to spend. Has anyone found an in-between option? I've been googling and haven't found much. I use it for punching paper, but at some point might consider hunting with it.