2B16 Nona-K is simply a very uncommon construction, presently occurring most likely only in the state of [Russian Army](https://defence24.pl/war-on-Ukrainianie-report-special-defence24/withdrawn-armatomozdzierze-notified-on-crime) and Ukrainian. In addition, the fact that it was created in most likely a tiny (as in the standards of the russian military industry) number, thus capturing it on the front in the 5th year of the Russian invasion is worth noting.