Do the various under-barrel grenade launchers kills count toward any of the Explosive Directives? Like Multi-Kill and Frag kills?
When I got killed by them, they show I was killed with the weapon the UBGL attachment is on, so it doesn't contribute to frag kills but instead to the weapon it's attached. I think that it does contribute to multi-kills, I remember killing two people in one shotgun blast and that it gave me group kill bonus XP.