According to the material, which part is the primary one to remove to disable a weapon?

• A. Magazine
• B. Trigger assembly
• C. Barrel
• D. Bolt carrier group

Answer: (D)

The key idea is that a firearm’s operation hinges on the action cycling, which is driven by the bolt carrier group. This moving assembly coordinates feeding, chambering, locking, firing, extracting, and ejection. If the bolt carrier group is removed, the mechanism can’t cycle the action, so no new rounds can be chambered and spent cases can’t be reliably cleared. That effectively stops the weapon from functioning as intended.

Removing a magazine only stops feeding new rounds and doesn’t necessarily prevent a round already in the chamber from firing, so it doesn’t disable the weapon as reliably. The trigger assembly is the control that initiates fire, but the weapon’s internal cycling still depends on the bolt carrier group; without it, the sequence can’t proceed. The barrel is essential for directing the bullet, but its removal doesn’t address the fundamental operating cycle in the same decisive way as removing the bolt carrier group.