What caliber is the GAU-22?

What caliber is the GAU-22?

• A. 50 Cal
• B. 25 mm
• C. 20 mm
• D. 30 mm

Answer: (B)

Caliber is the bore diameter of the gun, meaning the size of the projectile it fires. The GAU-22 is a rotary Gatling-style cannon with a 25 millimeter bore, so its caliber is 25 mm. This weapon is used as an internal cannon on modern fighters (notably the F-35), designed to deliver a balance of round mass and high rate of fire. The other sizes listed correspond to different autocannons: .50 caliber is about 12.7 mm, 20 mm and 30 mm refer to other families of autocannons with different bore diameters and performance characteristics. So the 25 mm option is the correct caliber.

Caliber is the bore diameter of the gun, meaning the size of the projectile it fires. The GAU-22 is a rotary Gatling-style cannon with a 25 millimeter bore, so its caliber is 25 mm. This weapon is used as an internal cannon on modern fighters (notably the F-35), designed to deliver a balance of round mass and high rate of fire. The other sizes listed correspond to different autocannons: .50 caliber is about 12.7 mm, 20 mm and 30 mm refer to other families of autocannons with different bore diameters and performance characteristics. So the 25 mm option is the correct caliber.