Buy from Amazon.com : http://fave.co/1Dr8ndG

Nikon ProStaff 3-9 x 40 Black Matte Riflescope (Nikoplex)

Product Description :
Compact riflescope with 3 to 9x magnification and 40mm objective lens
Fully multicoated optical system transmits up to 98 percent of available light
Zero-reset turret with spring-loaded adjustment knob 36 inches of eye relief
Nitrogen-filled O-ring-sealed housing for waterproof fogproof performance
Nikoplex reticle quick-focus eyepiece measures 124 inches