I swap the sling from my M&P Sport, which is a Viking Tactical (padded) using QD swivels. I have the MOE 15-22 with the integral rear QD mount on the lower. (My Sport has a MagPul CTR stock which has an integral QD mount)

For the front QD on my 15-22 I just picked up one of these

QD Rail Mount Low Pro 90° | Damage Industries: Supplying US & Allied Forces Quality Equipment

Aim has a really good price on them but they are currently out of stock there:

Damage Ind. Low-Pro QD Sling Mount

(I have an MOE hand guard on my Sport so I use an Impact Mount-N-Slot on the Sport).