Leupold Mark 4 35mm High Aluminum Ring Mounts, Matte Black - 120180

Features: Mark 4 tactical bases are the only bases to accommodate both the oversized #8-40 screw and a #6-48 screw, providing compatibility with the widest range of modern tactical firearmsBoth styles of screws are included with each Mark 4 baseSecurely attach your scope to any M16 variant with a carrying handle using this rugged mountDelivers rock solid stability for repeatable accuracy, use with Leupold QRW mountsSecure your mark 4 CQ/T scope to any picatinny style mounting rail using this specially designed mounting bracketTwo rugged cross slot bolts secure the bracket for rock solid durabilityMark 4 bases accept mark 4 rings, cross slot rings and QRW/PRW ringsGet a precise and repeatable zero every time with this quick detaching mount for the Leupold Mark 4 CQ/T optical sightFits all MIL-STD-1913/picatinny style railsSystem employs a slot and spline design and comes in 1-piece and 2-piece configurations