UTG PRO M-LOK(R) Standard QD Sling Swivel Adaptor-FDE Cerakote UTG Pro m-lok made in USA standard QD Sling swivel adaptor Precision Machined from 6061-T6 aircraft grade aluminum with flat dark earth Cerakote finish for best corrosion and wear resistance Accepts any quick Detach Sling swivel with 0.37 inch diameter swivel stud