Moonwalker

The weapons seen in this movie are:

Thompson submachine gun

Used by Michael Jackson in the Nightclub to fire at Mr Big(Joe Pesci)'s troops.

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M1921 Thompson with 50-round drum magazine .45 ACP

Heckler & Koch HK94

Used by Mr Big(Joe Pesci)'s troops, modded to look futuristic along with an ammo counter.

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Heckler & Koch HK94A2 with Full Stock - 9x19mm

Unknown revolver

Used by Micheal Jackson in the Smooth Criminal scene. [1]

Shoulder Mounted Laser Cannon

Used by Mr Big(Joe Pesci)'s troops in the final battle scene.