The .50 GI Ammo is a pistol cartridge that was introduced into the markets in 2004 at the SHOT show. This bullet has rebated rim that has the same diameter as the .45 ACP Ammo. In terms of physical properties, the .50 GI Ammo is wider than the .45 ACP Ammo and has a slightly longer length. The .50 GI Ammo operates at pressure levels that can be compared with the .45 ACP Ammo. Even the recoil they produce is relatively the same. However, the .50 GI Ammo has developed a strong reputation for accuracy. Although, this accuracy could result from the expensive guncrafter pistols this cartridge is chambered in. The penetration of the .50 GI Ammo is very different from the .45 ACP Ammo since the .50 GI Ammo is one of the examples of the largest legally allowed caliber bullet. The overall length of the .50 GI Ammo is 31mm, while the bullet diameter measures 12.7mm. The 185-grain bullet is the lightest variant of the .50 GI Ammo that travels at a velocity of 1,200 feet per second and creates an energy level of 591 ft.lbf.
The .50 GI Ammo was designed and developed by Alex Zimmermann in 2004 in the United States.
The .50 GI Ammo has been used for hunting hogs, bison, deer, and even wildebeests thanks to the excellent power and penetration of the cartridges. This cartridge has also been used for self-defense in some regions.