nice joke...but lets get back seriously. The Zis barrage cool down is mostly ready whenever u need it. and cost the same like a grenade. it seems the barrage has even shorter reload cd than a grenade. Which is awefull since it wipe better than a grenade and have much more range. Much more.
look at brummbar. its barrage has more cd than a lefh.
zis barrage should have cd from 50sek
Without wanting to touch the ZiS/SU76 CD:
The Brummbär/LeFG comparison is nonsense. Brummbär can fire apart from the barrage. Its barrage is just a (very strong) addon.