The SpecterDR 1.5-6x employs ELCAN’s crystal-clear optics as well as long eye relief, making it ideal for designated marksman rifles and other long-range applications. As with all SpecterDR sights, its magnification and field of view can be changed instantly by throwing a lever. The user can also adjust the sight to illuminate the crosshair or just the brilliant red dot in the center.
Because the reticles are etched in glass, they are plainly visible even when losing electrical power because of battery failure or EMP. Armament.com.
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