What are/were Daisy's Grenades for?

So last night while having to camp a relay because of an AFK trapper, me and my friend were looking at daisy and noticed 2 grenade looking things strapped to daisy’s left side.
Anyone know what they are and used for? (Or were used for?)

Probably nothing I would guess. Caira has grenades on her belt as well that are not used.

Last man standing kamikazi daisy


Suicide bomber.

I want this to be a thing.
2strike daisy as soon as the monster is domed just runs at the monster and explodes removing all armor.