The boys from Milcomp visited us in order to test the APC556 PDW. Here is their review:
5.11 Tactical Series sling VTAC 2-Point
VTAC® Two Point Slings offer instant tactical flexibility with the ability to transition from strong side to support side. The VTAC® sling allows the user to secure their weapon across their back anytime two hands are needed.
Follow the instructions of the manufacturer