The sound of a rifle being fired varies depending upon the caliber of the bullets, but in general, it is described as a crack, much like the sound you would hear if you snapped a stick in half.
It sounds like an very short explosion. How loud the explosion is depends on the gun and cartridge that is being fired.
Anything from a pop to a boom
I would like your music to be more staccato. The soldiers heard the staccato sound of a machine gun being fired.
bang, boom, crack, kapow, kaboom
Yes, but only if the gun is not fired. If the gun you see on the big screen is fired, then it isn't an airsoft gun, it is a prop gun, or a cap firing gun.
There are several noises involved. The explosion of the gunpowder is one, and if the round is supersonic, the "sonic bang" (which sounds like a whip-crack) is another. There is also the sound of compressed air and bullet leaving the barrel (this is usually quieter than the others) and with semi-automatics, the sound of the action operating.
A gun typically is not what kills, unless we are talking about being clubbed with the stock or bayonetted. The bullet fired from the gun combined with the shooter's intent is what kills.
A bullet fired from a gun
The chamber is the part of the gun that holds the cartridge as it is being fired. They work by being made of very strong material that can withstand the force of the cartridge firing.
PewPewPew
It's the recoil from the force of the bullet being fired. The gun powder pushes the bullet forward and also equally pushes the gun back into your hand.
A round is loaded into a gun. The gun is then cocked and then fired.
When a gun fires, the primer and burning gunpowder eject residue. That residue is chemically like very few things OTHER than gunshot residue (GSR) If your clothes test positive for GSR, it is a pretty safe bet you were very close to a gun that was fired. It may or may not tell whether YOU fired the gun.
The light shown by the flash travels at the speed of light, while sound waves travels slower. It is the different speeds of light and sound that causes sound to be heard after seeing the flash.