Sylvan Arms RAPID ATTACH MOUNTING SYSTEM R.A.M.S QD Picatinny Rail Mount 3 Slot Black. Perfect for Quick Tactical and Range changes within a matter of seconds Designed for M-Lok rails Specifications for Sylvan Arms RAPID ATTACH MOUNTING SYSTEM R.A.M.S QD Picatinny Rail Mount: Manufacturer: Sylvan Arms Color: Black Finish: Black Anodized Fabric/Material: 6061-T6 Aluminum Gun Rail: M-LOK Length: 4.5 in Height: 1 in Features of Sylvan Arms QD Picatinny Rail Mount Perfect for quick tactical and range changes within a matter of seconds. Designed for M-Lok rails. Package Contents: Sylvan Arms QD Picatinny Rail Mount Sylvan Arms QDR100: QD Picatinny Rail Mount 3 Slot Black