I designed these targets with the help of an Optometrist specializing in performance vision training for the US military. Use these targets to get a 100-yard zero for your 5.56 carbine, but you only need to shoot at 25 yards. 100-yard zero gives you the flattest trajectory for better accuracy. (I do recommend you confirm your zero at 100 yards if you have the distance) So, what makes these so much better than the old Army sight-in targets? Well, take a look at the pictures looking through the two optics. These specially designed targets are MUCH easier to see. BTW: The red dots are the same size in both images. Stop wasting time and ammo sighting in so you can spend more time training. Includes: Packs of 25 targets Printed in the USA High-Quality, Hi-vis paper Detailed directions for use on the back of each cover sheet