How to Pick the Right Ammo for Your Glock™


If you’re reading this, then we probably don’t have to tell you that the Glock™ is one of the world’s top firearms and an essential weapon for military and law enforcement agencies around the globe. The Glock™ has plenty of factors working in its favor, boasting unmatched reliability, a lightweight design, and an above-average magazine capacity.

But like any firearm, a Glock™ can only perform to its highest potential when it is properly loaded with the right ammunition. So, what ammo does a Glock™ use? You need to know exactly which Glock™ handgun you have to answer that question.

We’ve put together a handy guide to choosing the right ammo for Glock™ handguns, covering the most popular models made by the manufacturer.

Essential Ammunition Terms

Before you start browsing Glock™ ammo for sale, you should have a solid understanding of how bullets are measured. This means learning about the most important parts of ammunition and the purpose each serves:

  • Cartridge: The cartridge includes the bullet, casing, primer, and powder, which are all necessary for the propulsion of the bullet.
    • The bullet is a metal projectile, which will be shot out of the mouth of a firing cartridge.
    • The casing is a tube, typically made from brass, which contains and holds together the entire cartridge.
    • The primer is a special cap located in the head of the cartridge, which ignites the powder when struck by the firing pin.
    • The powder, or gunpowder, will explode when the gun is firing, generating the energy to propel the bullet forward.

As you look for bullets for Glock™ handguns, you can expect to see these key terms referenced regularly. Now that you’re familiar with what each one means, it’s much easier to be a confident and informed shopper.

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Types of Ammunition

There are many different ammo types out there, with a handful that tend to be the most common:

  • .22 LR: Typically used for training and sports shooting, this rimfire cartridge is rarely paired with Glock™s.
  • 9mm: The most common caliber and widely-used ammo out there, the 9mm is often used as Glock™ ammo.
  • .380 ACP: Referred to as a “three-eighty,” this is usually seen in smaller handguns.
  • .40: Larger and slower than a 9mm, this ammo will generate more recoil.
  • .45 Auto: Even larger than a .40 caliber bullet, this ammo type increases the recoil factor even more.

Of these common types of ammo, many are frequently recommended for Glock™ handguns. A few types are not on this list because they are far rarer, though they may occasionally be suggested for use with a specific Glock™.

What Ammo Does a Glock™ Use?

The right ammo for a Glock™ will depend on the specific handgun’s identity. In other words, you’re going to need to learn a little bit about which Glock™ you have to know what ammo to use with it.

Some of the most popular handguns by Glock™ – and the ammo they use – include:

  • Glock™ 17: The well-known Glock™ 17 is one of Glock™’s smaller handguns. The correct ammo for a Glock™ 17 is 9mm, sometimes marked 9×19.
  • Glock™ 19: Considered the most popular Glock™ handgun, the Glock™ 19 uses 9mm ammo.
  • Glock™ 20: With a little extra power, the Glock™ 20 requires 10mm auto ammunition and isn’t seen quite as often.
  • Glock™ 21: This high-powered handgun takes .45 Auto ammo.
  • Glock™ 22: A standard-issue Glock™ 22 will be paired with .40 caliber ammunition.
  • Glock™ 23: Slightly more compact than the Glock™ 22, the 23 similarly uses .40 caliber ammo.
  • Glock™ 26: This impressively compact handgun (one of the most compact on the market today) requires 9mm ammo.
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Do you have a Glock™ that’s not on this list? Don’t make the mistake of simply guessing which ammo it requires. No matter what model you’re working with, the correct ammunition is a must.

The good news is that it’s pretty difficult to get the wrong ammo to fit in and fire from a magazine or handgun it’s not compatible with. Generally, you’ll realize you’ve made an error when the ammo doesn’t even properly fit. That being said, it can be possible – through pretty unlikely – that you do fire the wrong bullets from a handgun. In that situation, the best-case scenario is faulty performance, while the worst-case scenario is a damaged firearm or even an injury to yourself.

So, above all, make sure you choose the right ammo every single time.

Get Glock™ Parts and Accessories from Matrix Arms in Claremont, NH

Are you ready to maximize your Glock™’s power, potential, and style? Check out our outstanding selection at Matrix Arms of Glock™ aftermarket parts, accessories, and everything else you need to customize your handgun.

Get more information about Glock™ ammo and how to select the right bullets when you contact Matrix Arms today.

image Aleksey Kuzmenko

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Ethan Smith is a seasoned marine veteran, professional blogger, witty and edgy writer, and an avid hunter. He spent a great deal of his childhood years around the Apache-Sitgreaves National Forest in Arizona. Watching active hunters practise their craft initiated him into the world of hunting and rubrics of outdoor life. He also honed his writing skills by sharing his outdoor experiences with fellow schoolmates through their high school’s magazine. Further along the way, the US Marine Corps got wind of his excellent combination of skills and sought to put them into good use by employing him as a combat correspondent. He now shares his income from this prestigious job with his wife and one kid. Read more >>