Used primarily in conjunction with reflex rifle optics, a magnifier is an accessory optic that is usually attached via a swivel mount behind the red dot sight. Using a mount like the SIG SAUER PowerCam, the shooter can swing the magnifier 90-degrees away to engage targets close using just the 1x reflex sight, then snap the magnifier into place behind the reflex sight to engage targets at a distance. Magnifiers typically come in models that increase optic magnification by anywhere from 3x to 6x.