Op-Tech sling vs Magpul sling: Comparing Op-Tech double sling strap (holds 2 cameras) to Magpul MS4 dual QD sling (1 camera, 2 Quick Disconnect connectors). I own both of these items.
Is the Magpul MS4 Rifle Sling Actually the Ultimate Camera Sling?
Magpul MS1 Slings
Switched From Peak Design to Magpul Sling: Accessories Talk Forum: Digital Photography Review
Sling Strap Adapter Quick Adjust - System Connectors | OP//TECH USA