So I have a mossberg 930 spx that I want to put a red dot sight on it... It has the picatanny rail on top so I'm trying to figure out what red dot sight will hold up to the pounding of slugs and buckshot consistantly. I would prefer to find one around $100 or less if it's possible for what I'm wanting. Anybody have experience with a red dot that would work for me? Thanks for any info!