Iron sights work great out to 200 yards. They also never need batteries. They also work well in the event of zombie attacks (because electricity will go first) and they are also superior in darkness especially if you get tritium sights.
Scopes are for long range daytime use rifles, which this one might be.... but if it is not, I would choose iron everytime.
My long range daytime rifle has peep sights, and a scope, but I'm silly that way. And yes, I can use both without removing or adjusting anything.
Do I even have a rifle.... I don't really remember.