A firing pin is a movable pin in a firearm that strikes the primer of a cartridge to set off the charge. In the case of the AR-15, it is located in the bolt carrier group and can be easily exchanged in the event that it is damaged or ceases to function properly.

In the AR-15 bolt carrier group pictured here, the firing pin is the silver-colored item in the middle of the picture.

In the AR-15 bolt carrier group pictured here, the firing pin is the silver-colored item in the middle of the picture.

Also called “Flash Suppressor”, “Flash Guard”, “Flash Cone”, or “Flash Eliminator”.black-rain-ordnance-ar15-flash-hider

A flash hider is a device which attaches to the muzzle of a rifle that helps to reduce the amount of flash/light seen by the shooter while firing by cooling or dispersing the burning gases that exit the muzzle.

The main purpose of a flash hider is to lessen the flash that the shooter sees when the firearm is discharged. A common misconception is that it’s primary goal is to lessen the flash signature seen by the enemy when the gun is fired. Fhider_SG_KFH_BK_lg

Flash suppressors are very different from muzzle brakes! While they are both located/mounted in the same place on the AR, muzzle brake is used to reduce the perceived recoil a shooter experiences (and typically has zero to do with eliminating flash), while the flash suppressor only limits the amount of flash the shooter sees and usually does not affect recoil.

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