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The US Army Developed this Unique 3D Printed Grenade Launcher

The United States military upped its game with this 3D-printed grenade launcher. The launcher looks like a weapon straight out of an action film, and rightly so. The working name for this gun? RAMBO.

[Image Source: US Army]
While not (entirely) inspired by the Sylvester Stalone character of the same name, it certainly looks like something Rambo would use. RAMBO stands for Rapid Additively Manufactured Ballistics Ordnance. Military engineers spent half the year building the 40-millimeter launcher inspired by the M203 under-barrel style. Everything but the springs and the .38-caliber cartridge was 3-D printed.

[Image Source: US Army]
Army officials said they were pleased with the testing performance that first happened in October 2016:
“The testing included 15 test shots with no signs of degradation. All the printed rounds were successfully fired, and the printed launcher performed as expected. There was no wear from the barrel, all the systems held together and the rounds met muzzle velocities within 5 percent of a production M781 fired from a production-grade grenade launcher. The variation in velocities were a result of the cartridge case cracking, and the issue was quickly rectified with a slight design change and additional 3-D printing.”

[Image Source: US Army]
The Army has yet to confirm whether the 3D-printed grenade launcher will see combat missions or even further production. However, it clearly shows a lean toward the US military’s investment in additive manufacturing. Additive manufacturing and industrial 3D printing offer a number of benefits including reproducing complex structures for a large scale.


Traditionally, additive manufacturing has been used for certain jet parts and even medical devices. Benefits seen throughout the movement toward additive manufacturing includes reduced waste and minimal assembly efforts. Largescale 3D printing also means that companies can test a variety of materials like the Army did with RAMBO). However, slower build rates when compared to traditional manufacturing and high production costs mean some still hesitate in investing in additive manufacturing.

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Hi, I`m Sostenes, Electrical Technician and PLC`S Programmer.
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