SWFA SS 10x42M Tactical Riflescope Mil-Quad Reticle 1/10 Mil Adjustments Side Focus SS10X42MMQ Matte Black Finish, 30mm Tube, Side parallax Adjustment Exposed finger adjustable turrets with 5 Mil's per revolution In sub-zero temperatures or searing desert heat (-50 degrees to +130 degrees Fahrenheit, and altitudes of 30,000 feet to depths of 15 feet in salt water) the waterproof, shockproof, fogproof SS performs. Made of lightweight aluminum but strong as steel, it has superior multicoated optics for maximum light transmission. Built to NATO specs