Primary feature of this Mod is adding a second function to every Q3A weapon. You must bind the alternate fire to a button (and you can set a key for the grappling hook, too. AF features a customized "quick" offhand grapple, which is enabled -in this case, always equipped- or disabled via \g_offhandgrapple <0 or 1> variable (default value is 0). But in case a map includes a "standard" Q3/OA offhand grapple to pick-up, there is a problem: please read Troubleshooting section of this page for infos and how to avoid the problem.). Alternate fires can consume more or less ammo than standard ones. See below for complete list of second weapon functions.