The Sylvan Arms Rapid Attach Mounting System, Quick Detach MLOK-Picatinny Rail 2 Piece Combo Pack features 2 different Quick-Detach MLOK parts from Sylvan. Utilizing their patented QD MLOK technology, you can easily remove these parts from your rail system and transfer them to another part of your MLOK rail, or to another weapon altogether with the compression of the 2 extended arms. The combo pack features a 3-slot picatinny rail mount for small accessories and a 7-slot picatinny rail mount for larger items. This value-packed combo gives you Quick Detach MLOK picatinny accessories for all occasions. RC100 2 Patented Rapid Attach Mounting System MLOK Rail Mounts, no tools required for installation. Fits MLOK Rail Systems Comes with 3-slot Picatinny QDR100 and 7-slot Picatinny QDR300 Made of 6061-T6 Aluminum Black Anodized 2-year Sylvan Arms Warranty