Magpul Sling Mount Kit Can be installed on the opposite side of UPS and Str stocks to add additional push-button QD Sling swivels or our Own Magpul QDM For running ambidextrous sling swivels on the SGA, MOE rifle, MOE fixed, hunter 700, and hunter X-22 stocks, this type 2 kit must be utilized in conjunction with the optional type 1 kit Heavy-duty Black phosphatized steel construction easily installs with The UBR or STR's original hardware, or with the hardware included with the type 1 kit Swivels not included; Made in USA Note: can not be used to run dual-side swivels on the ACS or acs-l stocks