3D-Printed Grenade Launcher

Created by the U.S. Armament Research Development and Engineering Center (RDECOM), this 3D-printed grenade launcher, called “RAMBO” (Rapid Additively Manufactured Ballistics Ordnance), is functional and made from aluminum using a proprietary direct metal laser sintering process. It took the team approximately 6-months to design and manufacture this weapon, with 3D-printed ammunition thrown in. Click here to view the first image in today’s viral picture gallery. Continue reading for the five most popular viral videos today, including one of an impressive size comparison of the universe.

5. Size Comparison of the Universe

4. Making of The Legend of Zelda: Breath of the Wild

3. Motorized Gray Fox Helmet from Metal Gear Solid

2. Testing the Potty Piano

1. Crushing a Vice with a Hydraulic Press