Haven't seen the movie but I'd bet dollars to donuts the opponent's rifle was a Dragunov SVD rifle which is probably no slouch in the accuracy department when used with the special sniping round made for it.
Rapid fire is not really a requirement for the "fantasy distances" that specialty 50 cal and 338 Lapua rifles are employed at. Bolt action rifles are probably still viewed as more reliable then an auto loader.
WRT "fantasy distances"
Longest recorded sniper kills - Wikipedia, the free encyclopedia . These distances are mind boggling especially having shot 1000 yard matches but they are quite real.
Bob