I have had the sight on an M1A for 500+ rds, and on an 870 for over 200 rds. Thus far it has not needed to be re zeroed after use. The light out put is very usable, and the night vision compatibility is fantastic , clear and precise, that truly amazed me. It was actually a joy to use shooting clays.
Pros: size, weight, precision, quality
Cons: small view window
This review was written in the old system and had content requirements that are different than reviews written today.