I use it on a Mossberg 500 (shotgun)--its gets the job done, for a shotgun any downfalls for being a low end red dot doesnt play a big role.
For the price this is really a great red dot, but it does, as expect have low end glass and a dot that is slightly smeared.
I cant comment about it holding zero since, I have put it though much use, but for a shotgun any tiny moments that may occur are not causing negative effects at 25 yards with slugs and 00 buck.
Pros: Cheap and effective, well made
Cons: dot is not smooth
This review was written in the old system and had content requirements that are different than reviews written today.