Because Damage put their foliage green stuff on clearance, I ordered a complete carbine set for less than I originally paid for just the stock part once.
When you buy the stock by itself, you get a sling loop.
When you but the furniture set, you don't.
Since the entire point of their stock is to get the QD swivel socket...
... and the loop digs into my shoulder, I didn't need a redundant place to mount a sling.
Something nice about the loop-less version is the little plug to make things look neat and clean.