These Sun Optics rifle scopes come with Picatinny Tri-Rail and precision ground, fully coated optics, dry nitrogen filled, 100% waterproof, shockproof and fog proof, tri-rail equipped, integrated mounting system, fast focus eye piece, and sharp edge to edge clarity at every power. The IR denotes illuminated retical on some models.

Features and Specifications:
Manufacturer Number: CS12-RM428IR
Sun Optics
Magnification : 4x
Objective : 28mm
Field of View : 25.5 feet at 100 yards
Eye Relief : 2.75 inches
Length : 7.9 inches
Weight : 14.7 ounces
Reticle : Illuminated Mil-Dot
Adj Size : .25 MOA at 100 yards
Fully multi coated optics
Dry nitrogen filled
Tri rail equipped
Solid recoil key
Integrated mounting system
Fast focus eyepiece
Mil-dot reticle red/green mode
Finish : Matte Black