****What is your budget and intended use? How far do you normally shoot? If you plan on being able to use the gun for both close and mid range shooting something like an Aimpoint PRO and a 3x magnifier that swings out of the way can make your setup more versatile, but it is a red dot setup versus a true cross hair type scope.
A dedicated scope can be either fixed magnification or variable. How far you intend to shoot as well as your budget will determine what optic would work for you. Good optics are not cheap, but there are definitely some more value priced optics from Bushnell, Burris, Nikon, Leupold, Redfield, Vortex, etc.. that can be had for perhaps less than $300.
Whats your budget and max range you plan to shoot? There are some good deals right now on whats left of nikon scopes. A m tactical 3-12x would work nicely on that rig. Also seeing the bushnell nitro sfp & ffp on sale online at good prices. I just ordered a riton x3 conquer 3-15x for under $400 to mount on a lr308 build. Was impressed enough with the x1 primal 4-16x on a budget gun to spend a little more and try the x3.
If price is a concern, I would recommend one of the Vortex Strike Eagles, either a 1x6 or 1x8. They are not the best for sure but they are very good for the money.
Below’s a good idea of what you probably don’t want to do ... Vortex Diamondback 3.5 - 10 on a DPMS G-II 16” bbl.
Bit much, I admit ... and not only size wise but, heavy also (which is really screwed up as I went with the GII MOE as it was one of the lightest 7.62’s out there .... ()
All the other kids at the club make fun of me, that is, until the smaller steel targets start ringing from the 200 (offhand!) and 300 (sitting / kneeling) a yard lines, hehe!
And, it just so happens that 200 and 300 steel plinking is what I picked the gun up for so ...
I picked up a much more appropriate sized Leupold MultiGun FireDot 1-6x but, just mounted that in the wife’s pencil barreled AR this afternoon (it is schuhweeeeet!)
Anyhoo, were I to do it again yes, I’d go with a smaller footprint scope ...