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What type of ammunition does the M16A2 use?

  1. NATO 7.62mm

  2. NATO 5.56mm

  3. Standard .223 Remington

  4. NATO .308 Winchester

The correct answer is: NATO 5.56mm

The M16A2 is designed to fire NATO 5.56mm ammunition, which is specifically engineered for use in this rifle. The 5.56mm round gives the M16A2 a high velocity and flat trajectory, making it effective for military engagements. This caliber provides a balance between manageable recoil and sufficient stopping power for personnel-targeting scenarios. Additionally, the 5.56mm NATO cartridge is widely utilized in various military operations, enhancing logistical compatibility when used alongside other NATO forces that also utilize this ammunition. The other choices, while representing different calibers, do not apply to the M16A2 platform; for instance, the 7.62mm and .308 Winchester cartridges are used in heavier firearms such as sniper rifles and machine guns, while the .223 Remington, though similar to the 5.56mm, is not loaded to the military specifications that ensure reliability and performance in combat situations.