My new favorite sling - Magpul MS4 Dual QD GEN 2 Multi-Mission Sling

Thus far I've really enjoyed the versatility of this sling, but not only because of the choice between one point or two point attachment. The adjustments to it's length can be made quickly and pretty much effortlessly as you change shooting positions. I'll be picking up another for a different rifle once the price of ammo comes down, since that's eating up my toy budget for the time being.