Just bought an Springfield Saint-AR15

[XDM Elite Tactical]

I bought a Magpul Sling when I bought the Rifle; but the Saint doesn't allow me to by default put the sling on it except at the front of the barrel; and it gets heavy after walking for miles.

Check out bcm website they have adapters for quick detach ends I just did this on mine and installed a Larry Vickers 2 point sling and it made all the difference in the world make sure that you know what the width of your sling is and what you have on your handguard wether it is key mod or mlock. Hope that helps.