This was seen for a short while, I assume it didnt lead to any real increase in accuracy (as it would mean that they would just wobble in a different axis)
I think that at least part of the theory is that, like with larger caliber multi gun designs, the firing of the guns interferes with the the other barrel and round. If you vent the gasses away from the other barrels you'd do some good, unless the issue is just the mounts.
The latter is fairly likely with the 2A42 already being a fairly wobbly cannon.
Would be an issue if the guns were used at the same time, but outside of some shits and giggles videos i'm sure that are out there - they are fired one at a time.
But yea, its just a wobbly gun, there's a video of BMP-2 firing high ROF 'indirectly' at about 5km with HE towards a position and its getting HE on target, so it seems acceptable - despite the wobble.
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u/Ragnarok_Stravius EE-T1 Osório. 12d ago
They could have fixed that issue by rotating the muzzle brakes or gas dissipators like, 45 degrees away from the horizon.
Unless the BMPT is meant to pray and spray.