I have a fn herstal 300wsm on a mc a4 stock. I have several different places to attach a sling, but one problem its not a regular swivel stud its differnt its just a hole. I know im soundind really stupid now but i need a link to order a sling cuz i cant find them anywere. I just started getting into the tactical thing, always had remmy 700's an encores lol, hunting rifles. Can anyone help?