It's a good optic for the price, but save it for a .22. You would be better served by an Aimpoint pro, hard to beat for the money at $400 or less. I had an ACOG 3x on mine, but decided I like a standard red dot sight better than the chevron reticle on the ACOG. What's wrong with the Burris Fastfire? I have a Trijicon SRS on mine now, I really like it but it is overpriced for what it is.The Lucid HD7 has nothing but good reviews, might have to look into it.