It depends on the gun. The question is a little to vague.
Ammunition shelf's were where the soldiers kept their ammunition and guns.
Yes, the Medusa is one.
No. People just modify Nerf toy guns to look like real guns. They cannot shoot real ammunition.
Those that are marked for 9mm ammunition. Shotguns, rifles, handguns all have been or are chambered for 9mm
Yes, guns shoot bullets
The guns are ruined. The ammunition will get hot enough to go off.
Most blank guns are simply not strong enough to contain the pressure of a live cartridge.
Whatever the correct ammunition is for that gauge. Sabot-loaded slugs tend to be somewhat more accurate than so-called "rifled" slugs in most guns.
There are various types of ammunition. There are also particular guns that use the recently developed 30 mm ammunition. Among them are aircraft guns and armoured vehicle guns.
They made ammunition in most popular calibers.
Remington is best known for all sorts of guns, and accessories to guns such as ammunition and carrier items to hold the guns. They are priced at a decent and affordable price if one is looking into purchasing a gun.
Machine guns make it easier to advance into enemy territory because they shoot off rounds of bullets faster than a regular gun. Machine guns also hold a lot of ammunition.