I purchased a Mueller 3-10 x 44 sport dot not too long ago. I put it on my AR-15, and have put ~ 250 rds. down range. It/I can obtain 1-1 1/2 inch groups at 100 yds. It seems to be a good, and rugged scope. The illuminated red dot helps in low light. The only complaint I have is with myself...I keep forgetting to turn off the illuminated dot, and run the batteries down...no big deal though, the black dot is fine. For the price I'm very happy with this scope, I'm saving to get a Browning BLR .308, and put the scope on it. I purchased the scope on SWFA, but there are same/competative prices on e-bay.