Which classification does the M9 sidearm belong to?

• A. Revolvers
• B. Submachine guns
• C. Semi-automatic pistol
• D. Rifles

Answer: (C)

The M9 sidearm belongs to the classification of semi-automatic pistols. This type of firearm operates by using the energy from the fired round to automatically cycle the action, eject the spent cartridge, and chamber a new round from the magazine. This design allows for quicker follow-up shots compared to revolvers, as the user does not need to manually pull the hammer back or cycle the action after each shot.

In contrast, revolvers are a different type of handgun that utilize a revolving cylinder to store and fire cartridges. Submachine guns are fully automatic or selective-fire weapons chambered for pistol cartridges and are distinct from semi-automatic pistols in their operation and application. Rifles, on the other hand, are designed for longer-range shooting and typically have a longer barrel and stock for increased accuracy and stability, making them unsuitable for classification as a sidearm like the M9.