What sling do you have? The ASAP plate isn't much fun to install and the dangling link can become very annoying. In fact, you'll see reports where many guys have just cut the thing off...not exactly a ringing endorsement of the design. I've used (and like) the Noveske QD end plate as well, but you need to buy a QD sling swivel if your sling doesn't have one. Many of the single point slings actually use either a hook or snap clip (like Magpul's MS3) for attachment hardware. Try to get your hands on any of the end plate mounts that have loops off to the side...some just stick out too far and will interfere with your manipulation of the rifle. However, I don't think any of those will work with the MS3 clips.
I've tried out many different plates and sling combinations and ended up making one that better suited my needs while solving a common problem for LE/mil buddies. You can read more about the Hook Up in this thread:
http://www.nyfirearms.com/forums/ar-15/25006-m-d-hook-up-sling-mount.html
The setup I'm using the most right now, is a MS3 and Hook Up. It gives me full ambidextrous range of motion, a fixed contact point to hook on to (unlike a sling swivel to chase around) and I didn't have to destroy the factory staking on my BCM and Noveske rifles. The sling doesn't get hung up on anything or get bound during transition drills and it's nice to click over to the two point mode when I come off the line.