IB Times: RAMBO, or the Rapid Additively Manufactured Ballistics Ordnance to give it its proper name, is a prototype weapon based on the US Army's M203 underslung grenade launcher used with rifles such as the M16 and M4A1 carbine. by Owen Hughes
'But RAMBO is unique in that all of its parts, save for the springs and fasteners, have been produced by 3D printing – and that includes the grenades themselves.
'The breech-loaded grenade launcher consists of 50 individual parts, the majority of which were developed through the additive manufacturing process. Additive manufacturing is a form of 3D printing whereby layers of material, commonly photopolymer resin, are printed on top of each other to create a 3D object.
'Of course for RAMBO, some of the components needed to be made from tougher stuff, so the barrel and receiver were printed from aluminium and the trigger and firing pin from ultra-tough 4340 alloy steel.'