Yes those are paintball guns mounted onto cars. This needs to become something you can actually play in real life with The Stig. Although he would probably hand you your ass but still. Can't wait to see Top Gear's attempt at this (which you know is coming). James May will get destroyed.
Audi RS 4 paintball fight. Yes, cars actually fighting.
search for anything!
e.g. The Penguin
or maybe 'Rebel Ridge'
House of the Dragon
Paul Mescal
search for anything!