The fact that Russia is facing shortages of certain types of weapons is obvious. They are short on ammunition too as well as parts needed to repair artillery and tanks - including howitzer barrels.
Recently, it has been noticed that the artillery shelling conducted by the Russian Army in Ukraine is
What is that a picture of?
Looks like an exploded howitzer barrel.
Yes, this is a barrel of a Muscovite self-propelled howitzer that has exploded due to overuse.