For which firearm?
Bolt and bolt carrier group
The firing pin and extractor for the M9 are housed within the slide assembly. The slide is the upper part of the pistol that moves back and forth during firing, and it contains the mechanism that strikes the cartridge's primer and extracts spent casings. This assembly is crucial for the functioning of the firearm, ensuring reliable ignition and ejection of spent rounds.
Several different ways. Firing a gun leaves traces of evidence on your skin from the gunpowder and from the primer of the cartridge. Many guns leave markings on the bullet that are unique to that gun (like fingerprints) and the gun makes marks on the fired cartridge from the firing pin and the extractor.
You need a gunsmith
Firing Pin
A bolt is one of the main components of a firearm - it's a part in loading the cartridge, firing (in conjunction with a firing pin), and ejecting the spent cartridge.
There'll be either the hammer or firing pin.. for centrefire weapons, it's typically the firing pin, and it's normally the hammer on rimfire weapons. This is what impacts the primer, thus setting off the reaction which ultimately ignites the gunpowder. That leaves an impression. The big one, however, is the extractor. This is the mechanism which grabs the spent cartridge casing, and pulls it out of the chamber as the action is cycled. Then there's the ejector, which is the mechanism which actually removes the casing from the grip of the extractor, and ejects the spent casing.
Wherever you need to. If you're in a field environment, just don't take out the firing pin or extractor, for the sake of not wanting to lose that tiny extractor pin or the small cotter pin which holds the firing pin in place.
It holds the cartridge in place for firing.
It holds the cartridge in place for firing.
firing pin , breech block, and extractor and ejector mechanism
A cartridge puncturing lever is a mechanism used in firearms to strike the primer of a cartridge, igniting the powder inside and firing the bullet. It is typically activated by pulling the trigger, causing the firing pin to hit the primer through the lever. This action results in the cartridge discharging and propelling the bullet out of the firearm.