This is a HEXMAG Rail Panel known as the WedgeLOK, model HX-MLC-4PK-BLK.
HEXAMAG's AR-15 4-Slot Low Profile M-Lok Rail Covers (4 Pack) add a unique look to your handguard and protect your investment. With their high-performance" non-slip design" these rail covers not only look amazing but they function better than others on the market and complete your rifle's ability to get the job done. The M-Lok rail covers use the patented WedgeLok technology to hold it securely to your hand-guard. When installing simply press each section firmly into each M-Lok slot. Once the WedgeLok is in place it will expand and lock in behind the hand-guard.
Features:
Spans 4 M-Lok slots for convenient installation and can be cut down for shorter lengths to fit around optics or hand stops
M-LOK WedgeLok Attachment
