Eotech 4x Magnifier Flip to Side Mount 4X.FTS The new Eotech 4X magnifier mounts behind the Eotech Holographic Sight(HWS) and expands its capability by offering target identification and sniper-type accuracy out to 600m. This high quality optic offers crystal clear viewing through extremely high light transmission, and maintains an expansive field of view by keeping the rectangular sight picture of the Eotech sight. Now, the best sight in the world has just become better. 4x magnifier with Flip-To-Side mount and quick detach. Works with all existing HWS units. Magnifier Magnification Fixed: 3.75X Eye Relief: 1.65" (42mm) Length: 4.6" (117mm) Weight: 12oz (340 grams) Temperature: -40 to 160 F Waterproof: 33 ft. Sealing: Fogproof internal optics Color/Finish: Non reflective black with hard coat finish Mount: Integrated dovetail for use with quick detach mount Retrofits to all HWS models Mount Length: 1.6" (40.6mm) Height: 1.64" (41.65mm) Clears common low profile flip up rear iron sights Weight: 4.5oz (128 grams) Color/Finish: Non reflective black with hard coat finish Flip Orientation: Ambidextrous mount to allow left or right flip Rail Interface: Fixed Picatinny with single mounting bolt. Magnifier Interface: Retained by ARMS® throw Optical Axis Adjustment: Horizontal and vertical adjustments within mount Works with either 3x or 4x HWS magnifier