The Leapers TLUSW001 QD Sling Swivel Adaptor is precision machined from 6061-T6 aluminum and finished in matte black anodize. It mounts bidirectionally in one M-LOK slot or in between two adjacent slots.Key FeaturesQuarter-Turn Rotational Over Travel Stops: Prevents unintentional sling swivel rotation, reducing the risk of sling entanglement.Compatibility: Accepts any quick detach sling swivel with a 0.37'' diameter swivel stud.Included Components: Comes with M-LOK T-nuts, screws, and an assembly tool for easy installation, requiring no gunsmith assistance.