And frankly if you want criminal danger in every corner you're better of basing your RP in crack-boom Chicago than Iraq or Afghanistan. At least during the 80's then Chicago's murder rate was something like three times the death toll of either of those operations. So you can fly the flag of realism and still roll around with heavy weapons. Or really even modern day Chicago...

But you're still not going to get to fly a Blackhawk over a urban wasteland shooting stuff with dead accuracy from a quarter mile up. You're just a SUV full of urban kids with glocks.