Terrible news! I've found the raws for the IBO manga volumes and I downloaded the last volume! the pics are a little pixelated but beggars can't be choosers you know? what's important is the fact that manga artist Kazuma Isobe chose violence and modified Orga's death scene so that he dies in Kudelia's arms
but wait! that's not all! there's also pages after they've brought Orga's body inside, and you get to see that Ride has the gun now
(everyone else's death in this last volume plays out the same, from Shino's to Mika's)