I know I will get blasted but...
Barska AC10332 -30$ from Optics planet.
I am not going to say it is a good optic, Would not even think of attempting to compare it to the above mentioed optics.
I have one that has seen rounds on a 12 & 20ga, .22, .223, .308 as it gets swapped from firearm to firearm over the last 5 years and has worked well. Is it a substitute for any of the above ... not really, but if you want to throw a couple $ at a red dot while you save for a real one, they are not a bad choice. For 30$ though you can get a spare in case one goes down and still not be far behind on saving for that good one later.