If you need one quick for low bucks go with the Simmons ProDiamond 4x 32. Hard to beat for about $39. Yes, Simmons has a pretty crappy reputation but check out the ML forum, a lot of us use this scope with no complaints. Clear glass, good eye relief and holds up to a lot of punishment. A fixed 4x will easily serve for 90% of your ML needs.

Check it out here.