This is a Magpul Industries Mount known as the M-LOK Tape Switch Mounting Pla, model MAG617-BLK.
The M-LOK Tape Switch Mounting Plate is a mount designed to attach Surefire ST pressure pads on M-LOK compatible systems. It is molded of the same high quality polymer as other Magpul products providing light weight with rugged construction" and the M-LOK recoil lugs and T-Nuts make for an extremely secure mounting system. A low profile design allows the user more mounting options without interfering with other equipment and it's rounded and beveled edges provides a snag free surface. Made in U.S.A.
Features:
Directly mounts to M-LOK compatible systems
Accepts Surefire ST tape switch only
Low profile design
