Magpul's new, proprietary M-LOK line is a "modular locking mounting system for the direct attachment of accessories." These accessories mount directly to M-LOK compatible fore-ends and offer rock-solid attachments for various accessories that previously would have required Picatinny rail space.
The Bipod mount attaches to a fore-end and contains a single swing-swivel for attachment of standard bipods like Harris or TacShield.
The Offset Light/Optic mount is designed to attach at the 10-o'clock position of the MOE SL fore-end and offers an angled, three-slot rail section for a tactical light, laser or combination unit.
The QD Sling mount attaches at any of the positions on the M-LOK-compatible fore-end to allow a QD sling swivel to be inserted wherever desired.