What is the difference between Safe, Semi, and Burst modes on the M16/M4?

What is the difference between Safe, Semi, and Burst modes on the M16/M4?

• A. Safe prevents discharge.
• B. Semi fires one round per trigger pull.
• C. Burst fires a three-round burst on supported models.
• D. All three modes have the definitions described above.

Answer: (D)

Fire-control modes define how the rifle releases rounds with a single trigger operation. In Safe, the mechanism is blocked so nothing will discharge no matter what you do with the trigger. In Semi-automatic, each pull of the trigger fires one round and the action cycles so you must pull again for the next shot. In Burst mode, on models that have it, a single trigger pull fires a short three-round burst, then you release the trigger and can fire another burst with another pull. This helps balance deliberate fire with controlled firepower and ammo use. Some variants don’t include Burst at all, hence it’s only on supported models. So the three modes correspond exactly to Safe stopping all firing, Semi delivering one shot per trigger pull, and Burst delivering a three-shot burst on supported configurations.

Fire-control modes define how the rifle releases rounds with a single trigger operation. In Safe, the mechanism is blocked so nothing will discharge no matter what you do with the trigger. In Semi-automatic, each pull of the trigger fires one round and the action cycles so you must pull again for the next shot. In Burst mode, on models that have it, a single trigger pull fires a short three-round burst, then you release the trigger and can fire another burst with another pull. This helps balance deliberate fire with controlled firepower and ammo use. Some variants don’t include Burst at all, hence it’s only on supported models. So the three modes correspond exactly to Safe stopping all firing, Semi delivering one shot per trigger pull, and Burst delivering a three-shot burst on supported configurations.