Them!

The weapons seen in this 1954 movie are:

M20 "Super Bazooka" (3.5" Rocket)

Used Sgt. Ben Peterson (James Whitmore) and Maj. Kibbee (Sean McClory)

Error creating thumbnail: File missing

M20 "Super Bazooka" 3.5"

Error creating thumbnail: File missing

Peterson, enjoying himself a little too much, takes aim.

Error creating thumbnail: File missing

Another bazooka used by Kibbee.

M1 Flamethrower

Used by U.S Army Soldiers.

Error creating thumbnail: File missing

Schematical drawing of M1A1 Flamethrower

M1928 Thompson

Used by the Police and the Soldiers

Error creating thumbnail: File missing

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

Blackburn's revolver

Doomed redshirt Trooper Ed Blackburn (Chris Drake) uses this revolver.

Error creating thumbnail: File missing

Blackburn unholsters his weapon and turns the light out so the unknown assailant (unknown to him, a giant ant) won't see him emerging from the room.

Error creating thumbnail: File missing

Blackburn prepares to meet his maker courtesy of giant mandibles.

Peterson's revolver

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

Error creating thumbnail: File missing

Peterson shoots at the ant.

Error creating thumbnail: File missing

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

Graham's revolver

FBI Agent Robert Graham (James Arness) shoots at an ant with a small snub-nosed (?) revolver.

Error creating thumbnail: File missing

Graham is told by an offscreen Dr. Medford to go for the antennae.

Error creating thumbnail: File missing

He does precisely that.

Snub-nosed revolver

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

Error creating thumbnail: File missing

The revolver lying on the floor.

Error creating thumbnail: File missing

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.

Error creating thumbnail: File missing

The rifle lying on the floor.

Error creating thumbnail: File missing

Peterson examines the weapon as Blackburn looks on.

Error creating thumbnail: File missing

Captain Edwards examines the gun.