Keep your expectations low - ADE Advanced Optics RD3-002 Tactical Micro Compact Reflex Red Dot Sight

Bought this to put on a Ruger 10/22. It's a low budget sight with low budget features. The red "dot" is more like a red "line" not crisp at all. You need to remove the sight to replace the battery, retaining zero might be an issue. Beware, did not come with a battery. Will be returning.