Post edited 11:17 pm – May 20, 2011 by forecaster
Jamie
Red dot (original brand, i.e. Kleenex) type scopes look like a short stubby optical scope, but when you look through them, you just see a lighted dot in the center that is powered by a small, watch battery. They are 1X for your 22LR, so no magnification which means it's easier to sight while keeping both eyes open.
Check out this one at MidwayUSA.com. Tasco Red Dot Sight 38mm Tube 1x 30mm 5 MOA Dot with Weaver-Style Mount Matte. Try to stay under $40. Some 22's have a smaller rail for the scope mounts. Make sure you measure you rails and get the right sized scope mount (Weaver type is standard). My 10/22 has no rails (grooves) in the top of the receiver. I just has threaded holes that are filled from the factory with threaded plugs that are tough to get out without stripping. Use a good tool to take them out. The rail with the grooves bolts on with some locktite to keep them from backing out. Yours may have grooves machined into the receiver top. This is a lot to think about to attach a scope, but I would not want you to miss any expensive little detail.

Good Hunting, Larry