Don’t get us wrong, Magpul makes some awesome AR-15 slings…but figuring out the MS1 vs. MS3 vs. MS4 sling or what acronym means 1-point vs. 2-point sling capability can be challenging. Today, we break it down “Barney-style” in the last Magpul Sling Guide you’ll ever need! (Until they make new ones, of course.)