Universal Ammunition: Difference between revisions
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== [[Real Life]] ==
* Kind of [[Truth in Television]] for armies of the world. The less kinds of ammo you have to stock and distribute, the easier it is to supply your troops. Imagine the logistics nightmare during World War II for the U.S., when any one squad needed .30-06 (M1 Garand and M1914 Machine gun, which take vastly different types of .30-06), .45 APC (Thompson and M3 Grease Guns), or .30 carbine (M1 Carbine). Compared to today where a squad usually only needs one caliber: 5.56mm. 7.62 is used quite a bit, but this is more for designated marksmen and machine gunners carrying the M240.
* The Colt Single Action Army Revolver or "Peacemaker" was available in .44-40 Winchester, which made it's ammunition interchangeable with the Winchester Model 1873 lever action rifle. A useful trait in the wild west.
* Fabrique Nationale's P90 Personal Defense Weapon and Five-seveN pistol share the same ammo, the 5.7x28mm cartridge, expressly designed for both guns. The [[wikipedia:AR-57|AR-57]] goes one step further - it is an upper receiver for AR-15 rifles that can be used to make them fire 5.7mm bullets, even loading them from the exact same magazines designed for the P90.
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* In general, submachine guns are issued in the service pistol caliber of the nation in question.
* One of the major reasons for the controversial U.S. Army replacement of the Colt M1911 pistol with the Beretta M9 was so that NATO armed forces would only need to stock one type of pistol-caliber ammunition (the M1911 was chambered for .45 while pretty much everyone else was using sidearms chambered for 9mm).
* One of NATO's standardization agreements (4179 specifically) decreed that all NATO weapons chambered for 5.56x45mm were to be designed to take the same magazines as the M16.
* Generally, while there are different kinds of calibers, many shotguns tend to take 12 gauge shells.
** Similarly, as with above, pistols chambered for 9x19mm are by far the most common.
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** A revolver chambered for .357 Magnum<ref>dimensions: .379 x 1.59 inches</ref> can safely use .38 Special<ref>dimensions: .379 x 1.55 inches. The slugs in both are ⌀.357</ref> or +P rounds. They're the same diameter, but the .357 case is slightly longer, so it cannot be used in a .38 weapon for safety reasons. Likewise, the .44 Magnum and .44 Special.
** This sort of thinking was the reason why nearly all Soviet small arms from at least 1891 to about 1974 fired 7.62mm bullets - even though they had different such bullets,<ref>7.62x54mmR for rifles and machine guns, 7.62x25mm for pistols and SMGs, 7.62x39mm for assault rifles</ref> if they ran critically short of barrels for ''anything'' during wartime production, they could take old Tsarist-era Mosin-Nagant rifles and recycle their barrels for use in other guns.
* Several modern sub-machine guns which have no relation to the Uzi will take Uzi magazines. Criminal made firearms in particular are quite fond of them.
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