While a 2 point sling is ideal for most situations there are times like deploying from a vehicle or fighting in complex structures when a sing point sling has an advantage. Combining the polymer Burnsed Socket and patented RED Swivel the Vickers 221 Sling allows users to switch from 2-point to 1-point mode instantly by pulling on the RED Swivel knob and reinserting it in to the Burnsed Socket at the rear of the receiver. The instantaneous adjustability of the sling is still maintained in both single and 2 point modes.