Like the OP, I have a 10/22 Takedown. I put a UTG 3-9x32mm Bugbuster on mine. It has an adjustable objective, illuminated mil-dot reticle, and comes with medium height QD rings. I mounted it using UTG's low profile rail that fits the 10/22 receiver. This rig allows the scope to stay on the rifle when it's put in the storage bag. Also, once the Takedown's adjustment ring was set up per the Ruger manual, I found that I could assemble and disassemble the rifle and even remove and reinstall the scope without having to rezero.