A-Zoom Snap Caps allow for dry fire training without wearing out the firing pin or other internal components inside the rifle. Snap Caps allow the firing controls to work as they should but without actually sending a bullet out of the muzzle. A Zoom constructs its snap caps from highly-durable yet lightweight aluminum, and then they are hard anodized for a long life of being stuffed into magazines, struck by firing pins, and ejected from the chambers. The proprietary Dead Cap allows for thousands of strikes, which means tons of practice for you.