USMC Infantry Rifleman (MOS 0311) Practice Test

Which back blast value corresponds to the AT4 launcher?

100m/90 degree 40m/30 degree 60m/60 degree 80m/45 degree

Correct Answer:

100m/90 degree

Explanation:

The key idea is safety from backblast. Firing a shoulder-fired, recoilless launcher like the AT4 creates a powerful blast that travels directly behind the shooter. To protect the operator and nearby teammates, there is a defined hazard zone: the backblast extends up to about 100 meters and covers a 90-degree sector behind the weapon. Before firing, you must ensure that no one is within 100 meters directly behind you and within that rear 90-degree arc. The other options propose smaller distances or narrower angles that do not match the AT4’s established backblast hazard zone, so they don’t reflect the actual safety parameters for this launcher.

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