Type/Color: 3X Magnification Fixed Size/Finish: 2.9" (6.5 Oz)/Black Matte Material: Aluminum/Polymer Other FEATURES:: Magnifier Is Recommended For Use With Trijicon MRO HD Only Standard MRO Sights Not Recommended For Use With This Magnifier. Other FEATURES2:: 3 Power Magnifier, With Flip To Side Mount