Always preferred the BAR in COD... haha. Down to personal choice I guess
Yeah I went up the World Trade Centre tower (I think it was the South Tower) back in 1997. I still remember those elevators! Ridiculously fast!
Had plenty of hitting power in COD yes so took less ammo to kill but in real life .45 rounds make a mess of flesh plus you have 100 rounds not 20. Big thumbs up for slaughtering capabilities.
You're forgetting though Gareth that more than likely the majority of the people that "Bonnie & Clyde" were shooting at were either in cars, hiding behind cars or hiding behind furniture/walls etc.
Thus they needed a hard hitting round which could penetrate objects finding it's target on the other side.
The .30-06 Springfield bullet fired from the BAR would have been travelling at around 2500 ft/s (approx) in comparison to the .45ACP from a Thompson at a much lesser 900 ft/s (approx) ~ both bullets weighing in at similar weights too depending on the exact bullet so in reality the kinetic energy expelled by the BAR bullet as well as it's penetrating powers would be significantly higher than the Thompson bullet.
Oh and if you're wondering that's why my username is GMballistic, ...it's my initials followed by "ballistic" because I'm very interested in ballistics & have been since I first started shooting as a young child.