The G30.FM Magnifier provides shooters with the same great magnification properties as our battle-tested G33 Magnifier at less than half the cost, this new-for-2020 product features a quick-detach fixed mount (MIL-STD-1913) for fast and simple mounting and unmounting behind an HWS. The G30 is compatible with all Eotech HWS models.Features:Fog resistant internal optics