The M249 fires from which bolt position?

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Multiple Choice

The M249 fires from which bolt position?

Explanation:
The M249 fires from an open-bolt position. In open-bolt designs, the bolt is held to the rear when not firing, so there’s no cartridge chambered. When you press the trigger, the bolt moves forward, chambers a fresh round from the belt, and fires as it contacts the firing pin. This setup helps keep the weapon cooler during sustained automatic fire and reduces the risk of cook-off, since the chamber isn’t filled with a hot round while idle. A closed-bolt arrangement would keep a round in the chamber at rest, which can heat up quickly under continuous fire and increase cook-off risk. The option describing semi-automatic relates to firing mode rather than bolt position, and boltless isn’t applicable to this firearm.

The M249 fires from an open-bolt position. In open-bolt designs, the bolt is held to the rear when not firing, so there’s no cartridge chambered. When you press the trigger, the bolt moves forward, chambers a fresh round from the belt, and fires as it contacts the firing pin. This setup helps keep the weapon cooler during sustained automatic fire and reduces the risk of cook-off, since the chamber isn’t filled with a hot round while idle. A closed-bolt arrangement would keep a round in the chamber at rest, which can heat up quickly under continuous fire and increase cook-off risk. The option describing semi-automatic relates to firing mode rather than bolt position, and boltless isn’t applicable to this firearm.

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