The Lewis Gun Soviet Marine squad has a regular infantry uniform in the Berlin campaign. I think they should have a proper marine uniform.
Pride is important for soldiers of all countries, especially special forces who like to feel distinguished. The British Paratroopers had a distinctive red beret, the British Marine Commandos green berets, and even the famed Soviet sniper of Stalingrad Vasily Zaitzev, who originally was from the navy, refused to part with his telnyashka (blue striped shirt)
There are various special squads that have unique appearances in every campaign
