Them!

The weapons seen in this 1954 movie are:

M20 "Super Bazooka" (3.5" Rocket)

Used by U.S Army Soldiers.

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M20 "Super Bazooka" 3.5"

M1 Flamethrower

Used by U.S Army Soldiers.

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Schematical drawing of M1A1 Flamethrower

M1928 Thompson

Used by the Police and the Soldiers

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M1928 "Tommy Gun" .45 ACP with 50-round drum magazine, made famous through countless classic gangster movies

Peterson's revolver

State Trooper Sgt. Ben Peterson (James Whitmore) uses this holstered revolver to shoot at a giant ant.

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Peterson shoots at the ant.

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Peterson comes to the conclusion his service revolver isn't doing much good.

Snub-nosed revolver

A snub-nosed revolver is found by Sgt. Peterson in the destroyed camper at the beginning of the movie.

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The revolver lying on the floor.

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Sliding a pencil into the barrel, Peterson picks the revolver up to examine it.

Lever-action rifle

A lever-action rifle, described as a 30-30, is found at Gramps Johnson's store with the barrel bent in half.

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The rifle lying on the floor.

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Peterson examines the weapon as Blackburn looks on.

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Captain Edwards examines the gun.