A few years ago I had put a TASCO Aim Point red dot on my 44 mag Hunter Barrel. The red dot had the adjustable brightness knob . I fired about 30 rounds. As I was turning off the brightness, I noticed the adjustment was "real loose". It's the only red dot I ever owned.No way to fix it without mailing it someplace. I hope they have made improvements since ! My son had a TASCO scope on a BB gun that was a POS. I would hope that the BSAs are better than the TASCO scope/sight .