Films with realistic depiction's of firefights and shoot-outs

I love film's with realistic shoot-outs... I really end up appreciating them more. No Country for Old Men has it's moments of semi-realism. Letters from Iwo Jima was a great war film where the guns sounded loud and fairly unflattering. The Assassination of Jesse James was pretty realistic for a film in a Western setting (though i don't really think of it as a western), the part where the two guys miss each other consistently at a close range is particularly memorable. Unforgiven was fairly realistic until the end, although i've argued about this with people on the IMDB forum, i still reckon that even if Clint's character could've taken on 5 or so guys because of his experience and cold-heartedness he probably still wouldn't take the risk. I'd also like to know of any other films with realistic firefights