[Brian McIlmoyle]

Is the attachment point of the weapon.. you want the sling attached just aft of the point of balance... Airsofts don't have the same weight distribution as RS so often the sling point is not in the right place for the AS version..

Also when it drops you want the Center of balance of the weapon to hang right at the point where your hip joint enters the hip socket.. this location on the body moves the least when you move... ( if you know how to move ) so the weapon won't flop around too much... If you have the sling adjusted too low.. your legs will bump it and it will swing and bounce around... To high and it will unbalance you as you move.. Proper sling adjustment is pretty important if you are going to maximize your capabilities.

The key is to have the sling adjusted so that it does not restrict the use of the weapon.. you can shoot from either shoulder.. but if you need to drop it an go to 2nd weapon ( or perform some task with the hands free ) the weapon gets out of the way and does not impeade your motion.