WHAT DOES 3RD ONLINE MEAN?

† Notice: The receiver-mounted, Picatinny-design and style rail is developed to accommodate most optics and optic mounts intended for use with Picatinny/ MIL-STD 1913 rails. Nonetheless, resulting from reduced clearance between the top in the receiver and The underside of your optics rail, optics and optic mounts that reach more than .Effect also