Great entry level red dot - Burris FastFire III Reflex Red Dot Sight

Good build quality, glass is good, has a tint but it doesn't ruin your site picure. I bought it for a 10/22 Takedown however it is not large enough for rifles. Has clear instructions and comes with what you need for rail mounting or slide cuts, windage/elevation screw driver included, ect. Ended up using it with an FN 502 (cowitness's very well). Overall happy with what I got for what I paid. I had trouble getting the battery compartment cap to thread back on, hopefully I didn't cross thread it. I like that it has an auto off but it won't wake up automatically, I knew that going in though so not a con. The only issue I have is with the power button, no matter how hard I push with my fingers I can't activate it, I have to angle my finger nail onto it, the rubberish button is holding up so far but eventually I'll end up wearing it out.