The grenade launcher comes with the following ammo according to the equip-soldier screen:
9x25mm HIT Grenades
16x25mm IC Grenades
20x25mm Flechette Grenades
I have no idea what HIT, IC or Flechette mean, so I visit the UFOpaedia.
The article on 25mm Flechette Grenades says they should be loaded into an HPGL Grenade Launcher. What's HPGL? No explanation in the UFOpaedia or on Google.
Next up, the 25mm HIT Grenade article. "High Impulse Thermobaric" explained, good.
Next article, the 25mm IC Grenade. For consistency with the HIT article, I would rephrase the first sentence to:
"This is a box of 6 25mm IC (incendiary) grenades."
Last, the Grenade Launcher article. No explanation of HPGL. I assume it means High Power Grenade Launcher, but then why write High Power Grenade Launcher Grenade Launcher. The 3D model of the ammo in this article shows three ammo units, but they are all HIT Grenades. Would be nice if it showed models of IC and Flechette Grenades too, and without clipping them (they dont fit in the box) [size=78%]http://i.imgur.com/hnA4k.png[/size]
I click on Statistics and cycle through the "With:" thing, and see "25mm PB Grenades". What's a PB Grenade?