One of the best features of this sling is ease of length adjustment to fit over clothing or armor, to permit switching shoulders when firing, or to use the sling for shooting support. Many other slings are relatively easy to lengthen, but none of the others I have experience with are as easy to shorten as this one. Shortening the sling isn’t usually as critical as making it longer and looser, but it’s still a nuisance if it’s necessary to use two hands, or necessary to unsling first, or all but impossible, as is true of other designs. The MS1® Sling is the most versatile addition to the Magpul® line of rifle slings. Built around our MS1 slider, this system provides rapid adjustments to either lengthen or shorten the sling with no slipping once it's set, with no tails, loops, or other potential snag hazards. The MS1 allows easy shoulder transitions, rapid adjustability for hands-free rifle carry and shooting support from various positions. The MS1 system also has a series of adapters that are sold separately and based on the MS3® and MS4™ slings. By adding the appropriate adapter for the sling (such as our Paraclip™, QDM or QD Sling Swivel), you can easily configure your MS1 for your fit and carry needs.