AOE does not work, but it works for impact point of projectile itself - the missile it can deal extra dmg if that hit someone face directly (if headshot mod is installed), same story is like with lasers, they have default 1.0x modifier for weak spots, once apply headshot dmg mod it changes into 1.5x and it works against heads... L-6 "shot" is no diffrent, if modded that way. In some regard how game engine handles weapons, L-6 aint follows diffrent rules than AR-50 or Aphelion does, all weapons have headshot modifer wich are L-6 and all lasers its just at 1.0x wich means it dont deal any extra dmg if weak spot is hit...You cant do headshot to explosive
Bit useless on use on L-6, but fun neverless, because its really hard to actually aim with missile into someone face directly... its harder to aim with it than with plasma rifle. At G5 the dmg is high enough already, and since mod only benefit the very projectile itself, it makes kinda questionable to use instead something else for limited slot on weapon, and just make use of AOE and body shots, than worry about headshots.