I got mine more for competition stuff (if I can find the time) rather than long range shooting. It had a base line Bushnell on it when I got it, have since put the flip up sights back on and yesterday picked up a combination carry handle/weaver rail (had never seen one before) and mounted that along with a TruGlo red dot I had. Seems to be a great combination as it easily does the co-witness without any adjustments. I like the truglo red dot even though it's cheap, it has withstood many a shotgun slug recoil.....so, cheap or not, it's been tough.
Just didn't feel a scope was right on that gun, but that's just me.