red-dot scope

Hey all, I'm mildly interested in putting a red dot on my Mossberg 590, but am not all that familiar with red dots and wanted to get some recommendations from those with more knowledge. The only real requirements I have are a maximum price range of around $150 or so and that it uses AA, AAA...

So im thinking about getting a magnifyer for my bushmaster ar-15 I have a eotech red dot sight on it and was leaning towards the magnifyer of the same brand but wanted to see if anyone knew of any other good ones that don't cost as much.

Hey everyone I am trying to decide, which red dot to get for my Smith and Wesson M&P15 Sport. I'm currently leaning towards buying the Vortex Sparc II, but I wanted other opinions! Let me know thanks

So I'm trying to find an affordable red dot that I can put on my S&W M&P15 Sport. I am really leaning toward the Vortex Sparc II, but I wanted other suggestions before the purchase. Any other better options for under $250? Let me know thanks!

I have recently purchased a Ruger 22/45 slab sided barrel... I'd like to outfit it with a red dot scope. Is there a particular type I need to get? Which brands are worth getting??