M141 Bunker Defeat Munition - Design

Design

The SMAW-D operates on the principle of a recoilless rifle, in that the recoil created by launching the projectile is counteracted by a "backblast" of gases fired from the rear of the weapon. This makes the SMAW-D inherently dangerous, especially in confined, urban areas, as is with all weapons of this design.

The M141 has two configurations: A carry mode in which the launcher is 32 inches long, and a ready to fire mode in which the launcher is extended to its full length of 55 inches.

The warhead is the same High Explosive, Dual Purpose (HEDP) as the USMC SMAW. It is effective against masonry and concrete bunkers as well as lightly armored vehicles. The projectile is capable of penetrating up to 8 inches of concrete, 12 inches of brick, or 6.9 feet of sandbags. The warhead is activated by a crush switch in its nose that is able to distinguish between hard and soft targets. On soft targets, such as sandbags, the detonation is delayed until the projectile is buried in the target, producing a devastating effect. The warhead detonates immediately on contact with hard targets.

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