Jaxshooter

It really depends on what you want to spend. The C-More line is very good because you can change the size of the dot by switching modules. Modules are available from 2 minute to 16 minute so you can tailor it to the game you are shooting. For a lower price reliable dot check out the Sight Mark line. The C-mores will stand up to anything you want to use it on. I have one on my Open Division race gun for USPSA shooting 9 mm bullets at 1490 FPS and on an AR-15 as well as a S&W 617 and Model 41. They have all been in use for 3+ years and have been 100 % reliable and I don't baby them. I have a Sight Mark on a 9mm AR-15 and on a AR-15 lower with a .22 Nordic upper that I use in Tactical RF matches.

I agree with Madhouse. It is excellent in my Anschutz and probably a waste of money in my AR even though it has a match grade barrel.