I can understand diverting the muzzle brake blast away from supporting infantry in street fighting, but wouldn’t this just make stirring up the dust from the ground problem even worse, obscuring the gunner’s view even more? Judging from the photos, this was obviously a field modification, how common was this practice? I don’t know a lot about the ISU-152, as I’ve never seen this before, but it doesn’t seem to have been adopted in post-war vehicle production, so was this a localized, street-fighting, late war modification only?
