S size. Certain you need some force, but this is because of The truth that the short alter buckle is held in place by friction. This is likely to be the weak point to another person but I have found this being of no troubles for me, the sling hasn't https://archerzsdkz.xzblogs.com/75362983/not-known-facts-about-blue-force-gear-vickers-2-point-combat-sling