This optic is New 

Aimpoint 3X-C  Magnifier 
103mmx45mmx45mm
4.1 inches x 1.8 inches x 1.8 inches 
Weight: 7.8 ounces or 220 grams 
3x magnification 
Dioptric: + 2.0.D
Night vision compatibility 
Eye relief 2 inches/56 mm