These Are the Essential Gun Parts [Short Guide]

No two guns take the same parts. The truth is, to people that don’t own firearms or even routinely use them, it probably seems superficially that all guns simply work in the same manner. You “load” them and “shoot” them.

However, to gun owners, or to anyone with anything more than a cursory understanding of how firearms work, it is immediately evident that guns do not all function in the same manner. In fact, most guns operate in manners so different that you need to develop a model-specific familiarity with one before you can safely handle, fire and clear it. 

That being said, you can still make an argument that in most cases, these are the essential gun parts that a gun shop should keep on hand for the value of repairs or replacements. 

1. Triggers and trigger assemblies 

Here’s one thing that firearms almost have universally in common. They all have triggers, and the trigger almost always releases a mainspring that activates the hammer or the firing pin. Not all triggers are adjustable or as complex as one another, but they are all necessary to the operation of a firearm. Your gun shop should carry the parts you need to remove, clean, replace or adjust your trigger groups. 

2. Barrels 

Rifled firearms will need their barrels replaced every so often. That is simply a fact of life, as every time a projectile travels through the bore, it will wear away some of the rifling’s lands. 

3. Firing pins or hammers

Whether your firearm utilizes a firing pin, a hammer that strikes the firing pin, or a hammer that strikes the exposed primer of a cartridge (or something like a caplock) these are vital gun parts that occasionally need to be repaired or replaced. 

4. Mainsprings and sears 

The sear enables the trigger to function. The mainspring provides the energy for the firing pin or striker to strike and ignite the primer. These break or wear out and need to be replaced, making them essential firearm parts. 

5. Action-specific parts (action bars, bolts and bolt handles, bolt carriers levers, etc.)

The action is, invariably, composed of moving parts, such as action bars, bolt carriers, bolts, bolt handles, ejectors, extractors, levers, locking lugs, springs and more. If these fail, the firearm doesn’t work, making them essential. 

6. Stocks

Without a stock, you cannot effectively fire a long arm, making them a priority item in any list of firearm parts, even if the stock itself is not a moving part – and in some instances, they are. 

7. Side plates or lock plates

Side plates or lock plates keep sensitive internal parts protected. They are necessary, because if they are missing they must be replaced. 

8. Sights or adapters

Finally, some firearms lose sights, lack sights, or have sights that have been bent or deformed. They’re also not particularly effective without them and are relatively affordable, which is why they’ve made our list of essential firearm components. 

Does your preferred gun shop not carry these essential gun parts, or not enough of them? If that’s the case, take your business online to Sarco, Inc. at, where you’ll enjoy a wide selection, low prices, adn staff that knows what they’re talking about. Visit their website, and if you have questions about the operability of your firearm, or how to perform model specific maintenance, give them a call at 610-250-3960. 

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By JohnMadrigal

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