Most if not all countries' armed forces use either the 5.56x45 or the 7.62x51 mm cartridge, if not both.
The AR-15 is not an automatic firearm; it is a semi-automatic rifle. This means that it fires one round each time the trigger is pulled, but does not continue firing automatically like fully automatic weapons. The AR-15 is designed for civilian use, while fully automatic versions, such as the M16, are military firearms.
Automatic weapons as we usually think of them are really semi-automatic. That is, you fire one bullet for each trigger pull, and the weapon charges itself with a new bullet automatically. These are not assault weapons, though most politicians think they are. Real automatic weapons will 'spray' out a stream of bullets as long as the trigger is kept pulled. These ARE considered assault weapons. They were outlawed largely because of their use by gangsters who had more firepower with them than the police did. Automatic weapons are pretty dangerous because of all the firepower they emit. The killings that you read about where "Assault" weapons have been used, have NOT used assault weapons, only semi-automatic weapons.
Allowing the use of automatic weapons
In the US Members of police bomb squads are police officers, the same as any patrol officer. As such, their job may entail the use and carrying of firearms. The bomb squad in the UK are members of the British Army, they are trained to use weapons in a combat situation but do not carry weapons on the streets of the UK.
it simutaneously shoot bullets out very fast. You can only use shot guns and 3 round burst weapons. When using a 3 round burst weapon it is immediatley automatic like an assault rifle. You cant tell someone has a jitter when their gun swings from side to side very fast.
.32 Automatic is the same as a european 7.65 pistol round.
theyre all equal its just how you use them
they used cannons knives and guns.
That's a bit of ambiguous question. Some armies have used - and some continue to use - General Purpose Machine Guns (such as the MG42, MG3, M60, etc.) in the squad automatic role, and these are clearly more powerful than the purpose built squad automatics of today. As for a dedicated, purpose built weapon, the most powerful cartridge used would probably have been the US .30-06 (7.62x63). However, the designs which used it were limited by other means. The M1918 Browning Automatic Rifle was limited in how much fire it could put out, both by the limited 20 round magazine, and by the non-detachable barrel, which could overheat. Weapons such as the Zb. 26, Zb. 30, and BREN (which was a variant of the Zb. 30) had 30 round magazines, were easier to reload with their top loaded magazines, and fired cartridges which, while maybe not quite as powerful, were still comparable (the 7.92x57 and 7.7x54R). As for weapons of current manufacture, there are two of particular note. The Russians had problems in Chechyna with the limited firepower of the RPK-74 (small cartridge, magazine feed, and fixed barrel), and have reverted to issuing some units with a variation of the PK machine gun intended to fill the same role. It's been lightened somewhat, utilises the 7.62x54R cartridge, and is belt fed, but still has a fixed barrel. Another weapon of interest is the Mk. 48 Mod. 0, developed for use by US special operations units. It's basically an FN Minimi/M249 SAW, but fires the much more powerful 7.62x51 cartridge. So that covers which ones fire the most powerful rounds, but as for which ones actually bring the most firepower into the fight, you have to consider some other things. Current purpose built squad automatics like the Minimi/M249, MG4, Amelli, and Daewoo K3 can be fed from a 200 round linked belt - that's 200 rounds they can fire without reloading. In a theoretical battle between automatic riflemen, where one has a weapon with a more powerful cartridge, such as the BREN, and one has a modern squad automatic like the M249, there would be several factors favouring the automatic rifleman with the M249 - lighter recoil for better control, and 200 round belt feed vs. 30 round box magazines. Since most rounds fired in combat are actually use for suppression and to establish fire superiority, this makes a big difference.
The glock 21 fires the .45 automatic colt pistol (.45acp, or .45 auto) round.
Yes, World War I saw the use of automatic weapons, although they were not as advanced or widespread as in later conflicts. The most notable examples include the Maxim machine gun, which was used extensively by both sides and significantly influenced trench warfare. Additionally, early forms of automatic rifles and submachine guns, such as the Browning Automatic Rifle and the MP18, were introduced toward the war's end, marking a shift in infantry tactics.
Automatic weapons typically use recoil or a gas blowback system to eject the spent cartridge casing and reload the next cartridge from the magazine. Blowback systems use the gas from the powder ignition of the cartridge to eject the casing and reload the next shell. A portion of the ignited gas is redirected to force the action back far enough to reload. Most automatic weapons use this design. Recoil systems are just what it implies - the recoil from the ignited cartridge forces the bolt back and reloads the next.