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Justice League is the 2017 crossover feature film that unites several of the heroes of the DC Extended Universe, which had previously been introduced in Man of Steel, Batman v Superman: Dawn of Justice and Wonder Woman (2017). Ben Affleck returns as Bruce Wayne/Batman, Gal Gadot as Diana Prince/Wonder Woman, Ezra Miller as Barry Allen/The Flash, Jason Momoa as Arthur Curry/Aquaman, Ray Fisher as Victor Stone/Cyborg and Henry Cavill returns as Clark Kent/Superman. Zack Snyder returns as the credited director for this film (along with reshoots and post-production overseen by Joss Whedon).
The following weapons were used in the film Justice League:
Heckler & Koch G36C
Gunmen who confront Wonder Woman are armed with Heckler & Koch G36C rifles.
Heckler & Koch HK416
The Heckler & Koch HK416 is used by a gunman to attempt to knock out Wonder Woman.
Heckler & Koch P30
Metropolis Police officers are seen armed with Glock 17 pistols during a confrontation at the Superman memorial..
Browning M2HB machine guns mounted on US military humvees.
The Batmobile appears to have been upgraded with what appear to be twin GAU-19 machine guns.
The Batmobile appears to have been upgraded with several weapons, which includes a massive cannon that resembles something like the Bofors 40mm AA gun. This weapon is mounted near the top of the cockpit.