Parts Of A Gun You MUST to Know!

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Does it feel like we have been social distancing for years now? It sure does to us, but we have taken this time to get back to the basics of firearms. We reviewed our notes and discovered we had not covered all the parts of a gun you need to know. So without any N95 masks on, we decided to change this at once! Wash your hands for 20 seconds and do not touch your face because we do not want the CDC busting down our door while we are reviewing gun anatomy.  

The Basic Parts of a Gun You Need to Know 

To make this easier to understand we have added diagrams below that label different parts of guns. One thing to know are calibers are not addressed in this article.

  • Action: The area where the magic happens or stated differently where the firing mechanism strikes the round to cause a combustion reaction that results in the projectile exiting the gun. The trigger is included in this portion of the weapon. 
  • Stock (handle): The stock is where a person absorbs kickback of the firearm when it is shot.  
    • For rifles and shotguns, the stock will connect to you where your shoulder and arm attach. 
    • For pistols and revolvers, the handle held by your hands. Note: Pistols’ and revolvers’ handle are also known as a grip.  
  • Barrel: The barrel is a long cylinder tub that has been bored out that the bullet, shot, or slug travels down before exiting the gun. This tub is made of high strength material to withstand the expanding gas pressure that occurs when the weapon is fired. Usually, a barrel of a rifle or pistol will have rifling inside it that causes the bullet to spin once it leaves the barrel.   

Parts of a Rifle 

Parts of an AR-15

Parts of a Pistol (Handgun)

Parts of a Gun Glock 19 Gen 4

Parts of a Revolver (Handgun)

Parts of a Taurus 605 Revolver

Parts of a Shotgun

Parts of a semi-automatic shotgun

Click here for essential handgun parts from, the World’s Largest Supplier of Firearm Accessories!

Gun Anatomy:
  • Bore– Is portion inside the barrel where the bullet, shot, or slug travels 
  • Breech– Is where a round enters into the chamber and is inserted into the rear of the barrel. This is known as the breech. 
  • The frame (pistols only)– Consider the frame as the skeletal structure of the gun. Just like the skeletal structure of our bodies, every part of pistols is attached to the frame somehow or is housed inside the frame. 
  • Clips or Magazines– Holds rounds for pistols, rifles, and sometimes shotguns that will be fired. Once a shot is fired and ejected, the spring inside the clip will push into the gun. Guns with this mechanism is called repeating firearms.   
  • Cylinder (revolver)– A cylinder is comparable to a clip in that it houses rounds that will be fired. A revolver is cocked, and the cylinder will rotate to align a cartridge with the rest of the gun. 
  • Hammer (mostly revolvers)– When the gun is fired, the hammer strikes the primer on the cartridge. This causes a chemical reaction that will result in the projectile leaving the weapon. Note: Some older style rifles, pistols, and shotguns have hammers. 
  • Firing pin– Many modern pistols, rifles, and shotguns use a firing pin instead of a hammer. Once the trigger of a gun is pulled, the firing pin will strike the primer of the cartridge. 
  • Muzzle– The Muzzle is where the bullet, slug, or shot exits the firearm.  
  • Trigger– The lever that when squeezed will fire the gun 
  • Trigger Guard– Wraps around the area of the trigger preventing accidental discharge of the firearm. 
  • Safety– A safety limits accidental firing of firearms when it is cocked. Note: Always consider a gun loaded and the safety off when handling and never point the gun at something unless you intend on shooting it.  


There you have it folks you are now a master of guns, and 007 or Rambow have nothing on you! Nah, we are just kidding. However, this information should give you a basic breakdown of the different components that make up a gun. Naturally, most weapons have many more parts that, if we tried to cover, would be a whole book, but at least you do have some basic knowledge now. Let us know what you think below, and until next time, keep safe and healthy!

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