How Striker-Fired Guns Work

Apex Tactical Heavy-Duty Striker for FN.
March 19, 2020
Tags :gun terms
Categories:Arms and Armor

Striker-fired guns are the bee’s knees. Rarely do you see a new gun come out in any design besides striker-fired. Hammer fired handguns aren’t dead, but they may be gone as far as armed professionals go. The United States military got rid of the hammer-fired Beretta for the P320. Most police forces have transitioned to these guns in various flavors, and most popular carry guns are striker-fired models. What exactly is a striker-fired handgun? How do they work? Well, let’s find out.

What’s A Striker-Fired gun?

All strikers are firing pins, but not all firing pins are strikers. Striker fired guns can best be described as spring-loaded firing pins. The racking the slide or pulling the trigger, or a combination of both cock the striker and the striker is held in the ready to fire position with potential spring energy behind it. Once the trigger is pulled, the spring energy propels the striker forward.

Image showing the internals of four striker fired handguns.

Strikers galore.

The striker then hits the primer, which ignites the gun powder, and so on and so forth. Striker fired guns are not all the same, though. They work under different systems, and the only thing they all have in common is that they lack a hammer.

The alternative in semi-auto pistols is a hammer-fired design. Hammer fired models are still prevalent, but less so for duty use, and even fewer are subcompact.

DAO, SAO, Partially Cocked, DA/SA?

What are most striker designs classified as? Are they DAO? SAO? Well, it’s not that simple. They could be both or neither. Most are partially cocked strikers. Glock uses partially cocked with their Glock slide. Glock popularized the partially cocked system in which technically it’s a double-action design, but also not really.

In these systems, the striker is partially cocked, and the trigger fully cocks the striker and releases it. This is technically two actions but does not fully cock the firearm as a tradition DAO would. This is the most popular striker-fired system.

Glock DAO? SAO? In these systems, the striker is partially cocked, and the trigger fully cocks the striker and releases it.

There are DAO striker guns, well there is at least two, and that is the P99c DAO and the CZ 100. I’m sure there are more, but they are a small subset of guns.

There are also SA/DA striker guns, which include the standard P99. These work just like a traditional hammer-fired DA/SA with the first shot being rather long and subsequent shots have a lighter, shorter trigger pull. Besides the P99, the MR9 and individual members of the Canik series are DA/SA, but there are also just P99 clones more or less.

The left side of the PPQ SF.

The left side of the PPQ SF.

There are also true single action striker guns. The Walther PPQ, for example, is an actual single action striker-fired design. These guns are like their hammer-fired brethren and have an excellent trigger.

You even get weird designs like the HK P7 in which you squeeze the grip to manually cock the gun into the single-action mode. Striker-fired pistols are likely more varied than hammer-fired guns.

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Why a Striker?

One of the most significant advantages of a striker-fired design is a consistent trigger pull. There are very few DA/SA striker-fired guns and even fewer DAO guns. Most striker-fired guns give you one constant trigger pull that’s often light and short, with a positive reset.

CZ Shadow 2 - hammer fired guns.

Still love my hammer-fired guns.

Another benefit is without a hammer, you are less likely to snag on the draw, especially from concealment. Striker-fired guns are also much more straightforward than hammer-fired guns. Putting a Glock together versus a CZ makes that readily apparent. A more straightforward gun means it’s more likely you can make upgrades or repairs at home. As someone who’s swapped both a Glock and CZ trigger, I can say the Glock takes about a quarter of the time.

Even CZ is making striker fired guns.

….But even CZ is making striker-fired guns.

The only real downside is the lack of DA/SA or DAO guns if you prefer that trigger system. A hammer does allow you to restrike a round if it fails to ignite, but with high-quality ammo, that isn’t that big of an advantage. Striker guns are the future for now, and I doubt we’ll see a big move back to hammer-fired guns. Might as well learn to love them, and this is coming from a hammer-fired fella.


Like semi-auto hotties?

Check out Ser Longpyke’s article on the VR80.

VR 80 review by Travis Pike (Ser Travos Longpyke)

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