Patent 10571218 was granted and assigned to TangoDown on February, 2020 by the United States Patent and Trademark Office.
The rail interface system uses a lever mechanism that pivots to extend through and restrictively engage the edges of the rail openings, thereby securely affixing the weapon accessory against the weapon or weapon component. The lever mechanisms may be adapted for use with M-Lok® or KeyMod style rail openings without the use of specialized nuts and fasteners.