What caliber is the GAU-18?

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Prepare for the Air Force's Maintenance and Electrical Systems test. Use flashcards and multiple-choice questions with helpful hints and explanations. Ace your exam!

Multiple Choice

What caliber is the GAU-18?

Explanation:
Caliber is the bore size of the gun, and the GAU-18/A is a seven-barrel rotary gun that fires .50 caliber rounds (0.50 inch, 12.7x99 mm). This makes it a heavy machine gun used as a helicopter door gun and similar platforms for close-range defense. The other options point to different weapon systems with larger projectiles—20 mm, 25 mm, and 30 mm autocannons—so they don’t describe the GAU-18.

Caliber is the bore size of the gun, and the GAU-18/A is a seven-barrel rotary gun that fires .50 caliber rounds (0.50 inch, 12.7x99 mm). This makes it a heavy machine gun used as a helicopter door gun and similar platforms for close-range defense. The other options point to different weapon systems with larger projectiles—20 mm, 25 mm, and 30 mm autocannons—so they don’t describe the GAU-18.

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