[ShelledPants]

TAD Mash Single Point is amazing. The trick to preventing the gun from swinging too much is to get it tight to the body (be with enough flexibility to shoulder the weapon and transition shoulders from main to offhand), and with the sling NOT having a T junction (you know, those slings which have an an extension coming off of the sling loop). The closer the gun's attachment point is to your body, the less it will swing.

The proper way to wear a single point sling, is off hand (hand you DON'T pull the trigger with) through the sling, then over the head, and then when you drop the gun to your side, drop it to your OFF hand, and push it behind your hip. It should stay under your armpit and prevent unnecessary movement.

Hope that helps.