depends on what you want it for.
I like the USGI in black USGI Sling Nylon or Cotton and other places on my 15-22.
same as Garand Sling

I have a leather sling, like this one Military Antiques, Military Collectibles and Militaria U.S. 1907 WWII Leather Rifle Sling: Steel Fittings (Garand Sling) IMA-USA.COM for my 22 wood stock bolt action.

both are CMP legal and work, are cheap too.