Garand Thumb's video covers different types of slings for the M4/AR-15 Rifle. The list of rifles he mentions are actually known to many airsoft players: Frank Proctor WOTG Sling, Ferro Concepts Slingster, BFG Vickers Sling, Viking Tactics Sling, Haley Strategic D3 Sling, and the Magpul MS4 Sling plus QD mounts to use. Which of these do you prefer to use?