I really like the Vickers VCAS and Viking Tactics VTAC slings. They're standard 2-point slings, are very easy to use, and very high quality. Expect to pay around $40, but it's a good investment in the long run. My current build is going to be outfitted with a VTAC Wide Padded Upgraded sling.
DinanTronics Stage 1 F30 328i M Sport
Dinan 20" Black Performance Wheels
Gunfighter Training Development and Evaluation
AR15/AR10 Armorer/Advanced Armorer
Gunfighter Training YouTube Channel