Single Stack vs Double Stack Magazines: What’s the Difference?

When it comes to choosing a magazine for your handgun, the main difference between a single stack vs double stack lies in their ammunition arrangement and resulting size.

Single stack magazines align bullets in a single column, resulting in a slimmer profile, while double stack magazines stagger bullets in two columns, offering a higher capacity at the cost of increased width. The sloping shape of the double stack follower alternates the feed of cartridges into the chamber between each column.

The choice of magazine will depend on the make and model of your handgun, though some handguns, like the Glock 43X, are designed with single stack magazines in mind but have aftermarket double stack options available.

Single Stack Magazines

Single stack magazines are favored for concealed carry due to their sleek and narrow design. Because of the slim design, they are often carried inside-the-waistband (IWB) or in a handbag. Popular choices include classical 1911’s, the Glock 43X, and the Smith and Wesson M&P Shield.

There’s a few pros when it comes to single stack.

The slim profile of single stack magazines makes the gun easier to conceal and carry. Individuals with small hands will find them appealing since they are easier to grip and offer better control. These types of guns are ideal for smaller men and most women.

They’re less likely to jam. The single column design of the cartridges feeds the chamber in a straight line, whereby reducing the likelihood of jams. 

Guns with single stack profiles can be customized to accommodate operators with larger hands, but not vise versa. If a user finds the grip to be too small for their hand, there are aftermarket attachment options to assist in increasing the grip. A smaller gun can easily be increased with aftermarket options, but a bigger gun cannot be decreased.

There are also a few cons to consider.

Single stack magazines have a lower ammunition capacity, typically ranging from 6 to 10 rounds, which may require more frequent reloading in high-stress situations. This is less than ideal for personal defense; you can imagine the advantage a 15 round magazine would offer over a 6 or 10 round magazine.

However, some will argue that true self-defense shootings are all said and done in approximately 3 seconds with an average of 3 shots fired, and that higher capacity magazines are more of a precaution than a necessity.

Additionally, single stack magazines tend to produce more recoil, which can affect the accuracy of follow-up shots. Recoil can also be influenced by other factors, such as the caliber of the ammunition. Higher calibers like .40 require more gunpowder and result in a larger explosion in the chamber, thus, more naturally felt recoil for the shooter.

Double Stack Magazines

Double stack magazines, as seen in models like the Glock 19 and Sig Sauer P320, also offer a considerable alternative.

Some of the pros of double stack are…

Double stack mags provide a significant advantage in ammunition capacity, typically holding between 10 to 20 rounds. This is crucial in defensive scenarios where every shot counts.

Double stack magazines are known to have less recoil, which helps to improve accuracy and steadier aim in follow up shots. Structurally, they have more material and a denser construction, which helps absorb recoil more effectively.

The wider grip of double stack pistols can provide a more secure hold for those with larger hands. Although they are harder to conceal, and the added bulk will make it less comfortable, it is nonetheless, easier to control. These types of guns are better suited for men with large hands.

On the flipside…

Double stack magazines may pose challenges for concealment and comfort for others. The larger size increases the likelihood of printing, which is when the gun’s outline is visible through clothing. Printing is undesirable because it can draw unwanted attention. 

The larger size handgun and extra bullets result in a heavier gun, however, a trade-off to consider is that a double stack magazine means you likely won’t need to carry an extra magazine, simplifying your carry setup.

There’s also a higher potential for jamming with double stack magazines. The cartridges are stacked in two diagonal rows, resting against an angled follower. As they feed through it is possible for a cartridge to become pinched in the mag, causing a jam. Although this is relatively rare, it is more common in double stack magazines than in single stack magazines.

The Best of Both Worlds: Double Stack Subcompact Handguns

The firearm industry has responded to the demand for a middle ground with a number of innovative designs like the Glock 43X, Sig Sauer P365, Springfield Armory Hellcat, and M&P Shield. These pistols combine the high capacity of double stack magazines with the slim profile of single stack magazines, offering a versatile solution that doesn’t compromise on concealment or firepower.

These are the most popular firearms on the market today for such reasons. You get the capacity of a traditional double stack, while maintaining the slim profile of a single stack handgun. This is the ideal solution for carriers that want the ammo count of a larger gun, but the footprint and ease-of-concealment of a single stack. 

Magazine vs. Clip

It’s important to clarify a common misunderstanding: “magazines” are often mistakenly called “clips,” but there’s a distinct difference between the two terms. 

A magazine is equipped with a spring mechanism that automatically feeds new cartridges into the firearm’s chamber with each shot. On the other hand, a clip lacks this spring action and cannot directly feed cartridges into the chamber. Instead, it can be used to load cartridges into a magazine.

Frequently Asked Questions

Can I interchange double-stack and single-stack magazines in my firearm? Not necessarily, but there are some exceptions. Generally speaking, a double-stack magazine cannot be used in a firearm designed for single-stack magazines, as it can lead to feeding and reliability issues. Some single stack firearm models, such as the Glock 43X, have aftermarket double stack magazines like the Shield Arms S15.

Is it possible to use single-stack magazines in competitive shooting? Yes, single-stack magazines are often used in competitive shooting disciplines with capacity restrictions, such as those organized by the United States Practical Shooting Association (USPSA) or the International Practical Shooting Confederation (IPSC).

Do legal restrictions impact the choice between single-stack and double-stack magazines? Yes, magazine capacity restrictions in certain states and regions can influence your decision, with single-stack magazines often being used to comply with regulations while maintaining concealability. Some blue states, like California and New York, don’t allow magazines that carry more than 10 rounds.

Are specific calibers associated with single-stack or double-stack magazines? Both types of magazines can accommodate various calibers, but single-stack magazines are commonly used for smaller calibers like 9mm and .380 ACP, while double-stack magazines are often found with larger calibers such as .45 ACP and .40 S&W.

Do single-stack magazines last longer than double-stack magazines? The lifespan of a magazine is determined by factors like usage frequency, material, and quality, rather than whether it is single-stack or double-stack.

Can I increase the capacity of my single-stack magazine? Yes, extended baseplates are available for some single-stack magazines, allowing for increased capacity, though this may impact concealability.

Are aftermarket magazines available for both single-stack and double-stack configurations? Yes, many manufacturers offer aftermarket magazines in both configurations, providing customization options.

Which is more reliable: single-stack or double-stack magazines? Reliability depends on the quality of the magazine and ammunition, not necessarily the type of magazine. Both single-stack and double-stack magazines can be highly reliable when produced by reputable companies.

Do I need specific training when switching between single-stack and double-stack magazines? Transitioning between different magazine types may require adjustments in grip, recoil management, and reloading techniques. Additional training and practice are recommended to ensure effective and safe firearm handling.

Final Thoughts on Single Stack vs Double Stack Handguns

Deciding between a single stack and a double stack magazine ultimately depends on your priorities and circumstances. 

If the ease of concealment and comfort are at the top of your list, a single stack might be your best bet. On the other hand, if you value having more rounds at your disposal and a fuller grip, a double stack might be more up your alley. For those seeking a middle ground, hybrid options are worth investigating.

What is your preference? Any benefits we missed? Let us know in the comments. 

Justin Trump

Justin Trump is the managing editor and owner of CAT Outdoors. The son of a Vietnam veteran, he’s an avid gun enthusiast and 2A advocate. He holds two firearm patents for the CAT M4 and Talon tools. When not managing CAT Outdoors, he enjoys spending time with his family and friends, rooting for Michigan sports teams, and serving his church.