Athlon Optics Midas M5 Magnifier Black. The Athlon 3-power magnifier mounts behind a traditional red-dot sight to provide magnification when needed. The mount has the ability to swing out of the way when not in use but can quickly be placed behind the red dot to increase the magnification for longer mid-range shots. Specifications for Athlon Optics Midas M5 Magnifier: Manufacturer: Athlon Optics Magnification: 5 x Objective Lens Diameter: 27.2 mm Eye Relief: 2.5 in Length: 3.7 in Weight: 11.6 oz Field of View Linear: 23 ft at 100 yds Optical Coating: Fully Multicoated Weather Resistance: Yes Fabric/Material: Aircraft Grade Aluminium Width: 2.1 in Height: 1.39 in Color: Black Condition: New Water Resistance Level: Waterproof Features of Athlon Optics Midas M5 Magnifier Water Proof Fog Proof Shockproof One Piece Chassis Construction Aircraft Grade Aluminum Flip Mount Fully Multicoated Nitrogen Purged Package Contents: Athlon Optics Midas M5 Magnifier Athlon Optics 403051: Midas M5 Magnifier Black