Carrying your weapon for extended periods can take its toll on your hands and arms if you do not have a sling. This can cause you to lose performance when it counts so it is within reason that a sling is a necessary piece of tactical add-on for any rifle setup. The Troy Viking Tactics Wide Pad Sling, Black - SSLI-VTA-WPBT-01 for example, provides added comfort for heavier firearms which can be a tough carry for long periods. For a quick switch from a one-point and a two-point configuration, there is the Magpul MS3- Multi Mission Sling System QD Sling Black AR Rifles 1 or 2 Point Sling QD Sling Cups MAG506-BLK. Different sling positions may need a different sling mount like the MFT Classic 1-Point Sling Mount, Black - OPSM or the ATI AR-15 Sling Swivel Adapter Kit - A.5.10.2385. AT3 has numerous items such as these and we try to keep as many of them in stock.