The Ukrainian design likely uses a recoilless gun concept, which hails from World War I's Davis gun.

Recoil semi-autos tend to be lighter than gas-operated guns, and they also have slimmer forends and more slender designs overall. The trade off is that they typically produce more felt recoil than gas ...

Here’s everything you need to build the best Kilo 141 loadout in Black Ops 6 including attachments, perks, and equipment.