Magpul MAG519-BLK MS1/MS4 Sling Adapter made of Steel with Maganese

The MS1 MS4 Adapter can be combined with the MS1 Sling and QD Sling Swivel (MAG540) to provide fast transition between one-point and two-point configuration. It has a heavy-duty push-button QD Sling Swivel for one-point attachment and QD Sling Swivels and ambidextrous QD shackle allows easy convertibility and provides weapon quick-release capabilities in an emergency. It also features a custom 1.25 inch wide nylon webbing material and colored webbing has Near Infrared (NIR) treatment to reduce IR signature. Rear mounting works with receivers, end plates, and buttstocks that have a push-button QD socket for one-point attachment.