M-LOK® Standard QD Sling Swivel Adapter is precision machined from 6061-T6 aircraft grade aluminum with a matte black hard coat anodized finish. Lightweight, low profile design uses the least amount of space M-LOK requires while retaining optimum mounting performance. Adapter mounts bi-directionally and efficiently utilizes rail real estate by mounting either in one slot or between adjacent slots on the same track. Accepts any quick detach sling swivel with 0.37'' diameter swivel stud. QD swivel housing is designed with quarter-turn rotational over travel stops to restrict swivel movement and to prevent sling from getting tangled. Includes M-LOK T-nuts, screws and assembly tool for simple and quick installation. No gunsmithing required. Made in the USA by Leapers®, Inc.