In all fairness, I would just chalk that up to whoever runs Reuters’ Twitter feed not knowing how to differentiate between a firearm and a paintball gun: https://twitter.com/Reuters/status/1526185858411405312
There’s another picture at the link.
https://www.reuters.com/world/europe/ukraine-says-it-has-repelled-russian-incursion-sumy-region-2022-05-16/?taid=62824ae78664e8000197c320