Go to Midwayusa.com and look at their red dots, they have just about everyone listed. Along with these are ratings from the people that purchase and use them. They get ratings between 1-5 stars. It's a great reference tool. I just got a Tasco ProPoint PDP2 brand new on ebay for $33+$10 shipping. It cost $80+shipping from Midway. I put it on my Mark II Government Target Model. The gun is quite a bit heavier and I don't like the profile but I still can't wait to try it out.....Hope this helps