This is a Magpul Industries known as the Rail Light Mount, model MAG588.
Designed for use with all M-LOK mounting surfaces" the M-LOK Aluminum Cantilever Rail/Light Mount allows the attachment of various MIL-STD-1913 Picatinny spec rail-mounted accessories such as lights and optics" and directly interfaces with the popular Surefire M300/M600 series Scout Lights or Magpul Light Mount V-Block and Rings. The Cantilever Rail/Light Mount has Picatinny slots that extend forward .75"-1.5" past the M-LOK mounting slot to improve ergonomics and optimize accessory positioning in a wide variety of uses" while keeping lights and accessories low to reduce the weapon's profile. Machined from milspec-anodized aluminum" the Cantilever Rail/Light Mount also features beveled ends and corners to reduce snagging and sharp edges. All hardware necessary for attachment directly to M-LOK Slots on either aluminum or polymer hand guards and forends is included. 3 MIL-STD-1913 Slots" max overall length of 3.15 in. Made in U.S.A.
Features:
Directly mounts to M-LOK compatible T-nuts
Recoil/Impact mitigation lugs
Milspec-anodized aluminum
