Built for shooting versatility the sightmark t-5 is a magnifier that mounts behind a reflex sight or red dot and provides an absolute co-witness.Instantly change the magnification of your close-range optic from 1x to 5x by using the t-5's flip-to-side mount.The magnifiers streamlined low drag design prevents it from snagging on clothing and equipment and makes the t-5.7 shorter than the magnifier its replacing.Ideal for stretching your ar engagements out to 200 yards an included lqd mount allows for rapid attaching/detaching in intense shooting situations.The t-5s aluminum construction is shockproof up to.308 caliber rifles and provides ip55 water resistant protection.Brightness and resolution are improved from fully multi-coated optics and external windage and elevation adjustments help shooters align the reticle of their red dot/reflex sight to the center of the magnifiers point of view.Magnification: 5xObjective: 23mmField Of View: 29.6 ft @ 100 ydsEye Relief: 2.25"Tube Diameter: 30mmLength: 4.72"Finish: Black MatteProofs: Water-Resistant/ShockproofOptic Coating: Fully Multi-Coated