Thanks for clearing that up, Avalon01. What kind of shotgun is this sling going to be for? I have a CQB sling on a Remington 870 that works pretty well for me. A standard 2-point sling should suffice, but like e8ght wrote, don't use a sling with built-in shell holders. I had an Uncle Mike's sling installed backwards and loaded with shells, plus a buttstock shell holder plus a sidesaddle, and the damned thing was very heavy and the extra weight swinging on the sling made it harder to control. If you use one of those slings, don't load it with shells.
Norcross110, I'm thinking about either a Giles or a CQB for my M590A1 but I don't care for the forward attachment point just below the muzzle. Also, doesn't the Giles cover up the shell holders in the Speedfeed stock?