The Viven-Bessières (VB) grenade launcher, adopted by French and US forces in WWI, revolutionized rifle grenades with its cup-style muzzle attachment. Unlike earlier rod grenades, the VB used a live ball cartridge where the bullet passed through the grenade to ignite its fuse, propelling it forward. The US adapted the design for the .30-06 cartridge, resulting in the M1917 series, with specific variants for the M1903 Springfield and M1917 Enfield rifles.
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