What caliber is the GAU-18?

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Study for the Air Force Test on Aircraft Maintenance, Electrical Systems, and Hazard Communication. Use flashcards and multiple choice questions with hints and explanations. Prepare for your exam today!

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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