Melee anim subsystem: stop the weapon sliding out of the hand when you run Added Player_RPropOnly.mask and a third playable in MeleeWeaponAnimationSubSystem that drives r_prop only and never fades with speed, so the arm keeps its run swing but the weapon stays welded to the hand. Switched on via PropMask on boneclub, candycane, machete, salvaged sword, combat & sunken knife,