The matte black EOTech G33.NM 3x Magnifier is ready for use with any compatible mount to magnify the view from your red dot or holographic sight. For co-witnessing raised iron sights, the STS mount comes with an optional 7mm riser. The G33 magnified optic features an improved 2" eye relief compared to previous EOTech magnifiers, and its tool-less design enables quick windage and elevation adjustments by hand. A compact footprint and user-friendly handling are complemented by the magnifier's O-ring sealed weatherproof housing.