The Viking Tactics L.U.S.A. allows the shooter to select from four different attaching options. With the VTAC - L.U.S.A you can use a quick detach sling swivel, a conventional sling swivel, a hook, or simply run the sling through the sling loop. The VTAC-L.U.S.A. allows a wide variety of options without changing hardware. For armorers the VTAC-LUSA eliminates the need to stock four different sling attachment brackets.