Push Button QD Sling Adaptor for M-LOK (M-LOK, 1.25 Inches) M-LOK(TM) Standard QD Sling Swivel Adaptor Lightweight, Low Profile Design Accepts Any Quick Detach Sling Swivel with 0.37'' Diameter Swivel Stud Includes M-LOK(TM) T-Nuts, Screws and Assembly Tool 6061-T6 Aircraft Grade Aluminum