I'm using an old Bugbuster Scope.
Here is what I would look for in scope for backyard rat shooting:
- AO (adjustable objective) = Must have this. AO is pretty much "focus". Not having AO makes shooting rats very difficult. AO is the focus. If it doesnt have it, when you zoom in on objects that are close, they become blurry and you have to zoom out to make the image clear. And rats are small... so even when close-mid range, you want to zoom in & have a clear picture of the rat's head. AO allows this.
- Adjustable Zoom = Must have this. Or you are stuck zoomed in at a specific setting..
- Parallax Setting = Close to infinity, I would not go over 10 yards to infinity. That means, you won't be able to focus on objects, that is over 10 yard distance. I really like 3 yard to infinity, because I like shooting very close range too. If a rat comes close to you... you can just zoom out and focus again, instead of moving backwards.
- Objective Lense Size = Largest possible that you can afford. Large objective lense means it is easier to see because it's a bigger scope opening. But that also becomes pricey. I have the 32mm one, it is on the smaller size, but works.
Here is how to read the confusing scope numerics (i'm a beginner too, so I only know the very basics)
3-12X32 = This means, it can zoom from 3 to 12 times (adjustable zoom). And it has a 32mm objective lense.
I think this would be a good choice for ratting:
This one does not have illuminated reticle, which I found to be a bit useless anyway. Also, with Dragonfly Mk2, I found out a rat would get insta-killed with just 5 or 6 pumps. So I'd just save my energy on pumping. Make sure to clean out the bore and tighten screws on the pump handle (some say they come slightly loose and screws fell out). I also ordered Buck Rail suppressor so it is very quiet. I also ordered a cheapo "Rifle Buttstock Pouch" to have cleaning stuff + pellets inside, so I have everything to shoot/clean with the rifle always.