MS4 Dual QD Gen 2 SlingDescription Filling the same mission requirement as the standard MS3 Sling, the MS4 can quickly switch between one point and two point configuration. The MS4 maintains material construction and specifications identical to that of the standard MS3, but features two heavy duty push button QD sling swivels rather than the Magpul Paraclip aling with a steel D Ring to allow one to two point convertibility. This modification allows compatibility with QD