URG and URG-N training grenades | NPO Smersh VR
It's safe to say that NPO Smersh VR has released a civilian version of the URG and URG-N training grenades.
https://vk.com/blackwinterairsoft - my VK
https://vk.com/smershvr - NPO Smersh VR
https://boosty.to/xiii - additional content