Have Model #19115 with M-LOK Fore end + standard butt Stock(not adjustable type). My first rifle.What MAGPUL Sling + "quick-disconnect" adapter(s) needed to attach sling to 1) M-LOK Fore End + 2)hole/opening on stock end. Need Magpul part numbers/description and best place to order from online. Want to attach sling at/near rear of M-LOK so I can add a light nearest muzzle end. Hope this makes sense from a newbie.