Iam very satisfied with this red dot, seems very durable and have had no issues yet. But I would like to say I am even more satisfied with freedom gorilla, I had issues with another red dot, possibly a fluke but these guys took care of my issues immediately, they got the HE508T out to me immediately, Jordan is excellent and very knowledgeable. It was a pleasure during business with Feedom Gorilla and plan on using them from here on out for my optic needs. Everyone sells optics but not everyone has good customer service. They have good optics at good prices but most important they have GREAT service.