MS4 Dual QD Sling - Magpul (Black)Because your situation can change fast, your sling needs to change even faster. Like our MS3 Slings, the MS4 Dual QD Sling quickly switches between one point and two point configurations when your mission demands it. With the steel QD cup D Ring and two heavy duty push button QD Sling Swivels, youll get QD cup compatibility and the ability to connect into the D Ring for one point use. The MS4s convertibility allows quick changes from your primary