The Primary Arms PLx HTX-1 is a truly revolutionary enclosed-emitter reflex sight built to the highest standards of quality and performance. Its patent pending Modular Chassis System (MCS) is compatible with almost all existing optics cut pistols and offers the lowest possible centerline, co-witnessing with standard height iron sights. With each optic comes an RMR Type A, RMR Type B (raised screw bosses), and GLOCK MOS mounting interfaces making it easy to mount to your pistol right out of the box.This pistol reflex sight is part of the top tier optics line called PLx. PLx optics meet the exacting demands of professional use, offering impeccable glass clarity and advanced features from state-of-the-art production facilities. FeaturesFully enclosed 7075-T6 aluminum housingType II hard coat anodized blackNarrow band glass reflex doublet with wide band A.R. coatingPatent pending modular chassis systemIncludes RMR A, RMR B (raised screw bosses), and MOS mounting interfacesLow mount heig...