User blog comment:Sentry 616/Weapon Gushing/@comment-27144409-20190719213529/@comment-27144409-20190806000945

I just realized II never mentioned how it kills a room, trench foxhole, etc. The main type of 25mm grenade it's meant to fire is the airbust ammo it shares with the XM-25, which is a neat idea, but not the best execution. Also the rounds detonated in the magazine of one test XM-25.

Malfunctions aside, the way you use it is you point the built-in laser range finder at roughly where you want the round to detonate. The weapon then copies the range over to the round's computer for distance tracking. When the round has traveled the set distance, it explodes, ideally in the target room or right above a trench, spraying the hostiles with shrapnel.