We have two Mini 14s acquired back in the mid seventies. They are, however, different models, the "lock back" outside control mechanism on the back left side of the receiver being different. I have never fired them much, but what shooting we've done indicates that there has to be an improvement in the sighting arrangement, (both of them now sporting the factory peep sight). For one thing, they don't stabilize at the clicks. At any rate, I don't know whether they will take the sight you mention above or not, but the site selling them says they are for "ranch rifles". (just starting back to fooling with my guns, so ignorant on a lot of stuff like this). How can I tell if the sights will fit these rifles, and, if not, are there alternatives other than scopes. We like the peeps for general farm use.
