Designed to mount directly behind a reflex sight or red dot the Sightmark T-3 is designed to mount directly behind a red dot reflex sight in order to provide you with a 3x magnification extending your medium to long range engagement ability.Ideal for engagements up to 100 yards if a close-range shooting scenario calls for no magnification simply use the T-3's flip-to-side mount to rapidly transition between the optic systems. Additionally the Sightmark T-3 comes with a locking quick detach flip to side mount which will perfectly mate up with any picatinny rail.This durable magnifier is constructed of aluminum and provides improved brightness and resolution from fully multi-coated optics. External windage and elevation adjustments align the reticle to the center of the T-3's point of view.Features / SpecsSightmark Item Number: SM190633x Magnification23mm Objective Lens2.25" Eye Relief43.3' Field of View at 100 Yards30mm Tube DiameterRated up to .308 WinchesterShockproofIP55 Water ResistantFull Multi-Coated LensPicatinny MountLocking quick detach mount for quick and easy removalFlip-to-side mount provides rapid transition between optical systemsFully multi-coated lens scratch resistantExternal windage/elevation adjustment for reticle alignmentIncreases magnification of accompanying sights for greater engagement rangeEOTech and Aimpoint compatibleAluminum HousingOverall Length 4"Overall Width 2.6"Overall Height 1.67"Overall Weight 10.6ozMatte Black Finish For more great savings shop our entire catalog of Sightmark Optics