Gas blast, auto only is most closely paired with which description?

Gas blast, auto only is most closely paired with which description?

• A. M240B locking system
• B. M249 locking system
• C. M249 type of feed
• D. M240B system of operation

Answer: (D)

The main idea here is how the weapon cycles and what fire controls it has. “Gas blast” points to a gas-operated action—the expanding gases from the fired cartridge drive the operating parts to cycle the bolt and chamber the next round. “Auto only” means the firearm is designed to fire in full-automatic mode and does not offer semi-automatic fire. The M240B fits this pairing best: it’s a belt-fed machine gun that uses a gas-operated system to cycle the action and is configured for full-auto fire in standard use. So the description describing its system of operation lines up with the phrase “gas blast, auto only.” The other options focus on specific components like locking mechanisms or feed types rather than the overall cycling method and fire-control mode, which is why they don’t match as well.

The main idea here is how the weapon cycles and what fire controls it has. “Gas blast” points to a gas-operated action—the expanding gases from the fired cartridge drive the operating parts to cycle the bolt and chamber the next round. “Auto only” means the firearm is designed to fire in full-automatic mode and does not offer semi-automatic fire.

The M240B fits this pairing best: it’s a belt-fed machine gun that uses a gas-operated system to cycle the action and is configured for full-auto fire in standard use. So the description describing its system of operation lines up with the phrase “gas blast, auto only.” The other options focus on specific components like locking mechanisms or feed types rather than the overall cycling method and fire-control mode, which is why they don’t match as well.