The Army has 3D printed a working 40mm grenade launcher they call RamboTheWeeklyCallerMarch 8, 2017 by TheWeeklyCallerMarch 8, 20170636 RAMBO (Rapid Additively Manufactured Ballistics Ordnance) was made on a 3D printer after a six-month effort — and has even fired 3D printed grenades to... Read more