DETAIL INFORMATION •  UTG PRO M-LOK® Made in USA Standard QD Sling Swivel Adaptor •  Precision Machined from 6061-T6 Aircraft Grade Aluminum with Matte Black Anodize •  Lightweight, Low Profile Design Uses the Least Amount of Space M-LOK® Requires While Retaining Optimum Mounting Performance •  Adaptor Bidirectionally Mount and Efficiently Utilizes Rail Real Estate by Mounting Either in One Slot or in Between Adjacent Slot on the Same Track •  Accepts Any Quick Detach Sling Swivel with 0.37'' Diameter Swivel Stud •  QD Swivel Housing Designed with Quarter-turn Rotational Over Travel Stops to Restrict Swivel Movement and Prevent Sling from Unwittingly Getting Tangled •  Includes M-LOK® T-Nuts, Screws, and Assembly Tool for Simple and Friendly Installation, No Gunsmith Required   Material: Aluminum Height: 0.46 in Length : 1.33 in Weight: 0.4 oz Color: Black