NO SCOPES PERIOD!!!!
Most you'll ever need is 1.5-2x magnification if that. You should read the FAQ's and you'll see why scopes are bad.
On the other hand. There are some good optics that you can get, including reflex sights, and red dot's. 99% of the time, out of the box you'll never need any kind of magnification. But it's should all be documented in the FAQ section there for you to read.
I personally use my BUIS and Red dot and that's probably all I need for a while.
ಠ_ಠLess QQ more Pew Pew
READY TO >> RACE