My wife andI both shoot Cobra Easy Slide single pin sights and have had very good luck with them for hunting and 3D shooting. The plastic scope body inside the aluminum scope housing needs to be " glued" in with silicone gasket sealer or it may produce some noise at the shot. Other than this, the sight has proven to be very durable. A couple of years ago, I noticed while shooting at game that my 3 pin fiber optic sight was " bluring " the pins togther under fading light conditions while I focused on the spot I wanted to hit. The pins were too bright and as close as they were set togther, they looked like one big pin. I leave mine set on 20 yards for tree stand hunting becauce of the likely possibility of a straight down shot. For me a single pin sight set for 20, 30 and 40 yards is the best for my hunting