Best Walther P99 Magazines – 2020 Guide

The Walther P99 is a reliable and accurate pistol that has been used extensively by police forces around the world. Intended to be a duty gun, the P99 is still a relevant and effective handgun for self-defense. This handgun comes chambered in different calibers and one very important component of this pistol is the magazine.

Here we’ll outline the best Walther P99 magazines on the market and evaluate them based upon widely accepted benchmarks. 

Comparison Chart of the Best Walther P99 Magazines

PRODUCTDETAILS
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Walther Arms P99 Magazine

  • New Walther factory mags in original packaging and great quality
  • 10 round capacity is optimal for all kinds of applications
  • Runs flawlessly and will seldom create feeding issues
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Walther P99 9mm 20-Round Extended Magazine

  • Very high capacity magazine of 20 rounds for more firepower
  • Great for target practice/range use and even home defense
  • Original Walther factory magazine with reliable feeding
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Are All Walther P99 Magazines The Same?

The magazines included in this review differ in a few aspects. The most basic of them being the capacity and caliber. Additionally, while some mags feature a simple stainless steel design, others can have a nickel-plated finish with windows for tracking ammunition. Magazines differing in caliber and capacity will also have different sizes to accommodate the respective ammunition. 

However, all the items included in this review have several common features as well. For example, all magazines are made from stainless steel, have a polymer follower and a high-quality steel spring. It is also important to note that blue colored followers tend to be more stable and less tilt-prone compared to black or red ones. 

Walther Arms P99 Magazine

What to Look For When Buying a Walther P99 Magazine

These are the most common focuses buyers have when shopping for their next mag:

Durability and Finish

While P99 magazines are always manufactured from stainless steel and you won’t find a polymer variant. It is important to consider the quality of an item. Magazines tend to be dropped and stepped over a lot, especially during training and range sessions. Which can cause deformities resulting in serious jamming issues. A good way to identify quality is to purchase mags from Walther or trusted manufacturers like Mec Gar.

Good Follower and Baseplate

You’ll notice the color of followers on different items to be different. While some feature a blue color, some are black or orange. The blue followers are the latest upgrade to P99 magazine and are more stable than other versions. Similarly, check the baseplate for easy disassembly and finger rest. 

Witness Holes

Witness holes are small circular holes on the side of the magazine which allow you to track the number of rounds left in the magazine. These can also come stamped with numbers for better inference. Witness holes are an important feature with extended and normal capacity magazines. Especially if you are stuck in a SHTF situation. 

Capacity

Walther P99 items come in a variety of different sizes. Ranging from 10 rounds to 20 rounds. Extended magazines are viable for practice and plinking but tend to be heavy and difficult to carry. You must choose a magazine based upon your intended applications. 

Quick Take - The Best Walther P99 Magazines

These are our recommendations for the best Walther P99 magazines:

  1. Walther Arms P99 Magazine
  2. Walther P99 9mm 20-Round Extended Magazine

Review of the Best Walther P99 Magazines 

Good P99 mags can be a difficult find these days. So we scoured the firearms market expanse and came up with the best Walther P99 magazines available online. These mags have been selected based upon legit customer reviews and their performance. Plus the variety in caliber and size will definitely let you find one for yourself. 

Pros

  • Includes witness holes for easy tracking
  • Glossy and durable black finish for aesthetics
  • Stainless steel construction and amazing baseplate
  • Features a legged anti-tilt follower for reliable feeding
  • Original factory magazine from Walther for tight tolerances

Cons

  • None that we could find

What Recent Buyers Report

This 10 round 9mm magazine is the OEM component for the P99 handgun manufactured by Walther. The users of this magazine reported flawless operation even after shooting hundreds of rounds through it. Users also appreciate the durable design and finish of the magazine. Along with the prompt customer service from Walther. 

Why it Stands Out to Us

The magazine showcases an impeccable quality and doesn’t put up any feeding issues whatsoever. Additionally, the magazine has been designed by Walther with exact tolerances which completely eliminates any compatibility issues. 

Who Will Use This Most

The item is a must-have for every Walther P99 owner. The 10 round capacity is optimal for the handgun to be used for duty, self-defense, practice, and EDC. The anti-tilt follower eliminates jamming, making the magazine reliable for use in SHTF and life or death situations. 

Bottom Line

This Walther P99 is a factory-made original P99 magazine that offers reliable feeding, high-quality construction and prompt customer support from the original manufacturer of the Walther 99. It can be used as a backup magazine while carrying the weapon as EDC. 

Best Walther P99 20 Round Magazine:
Walther P99 9mm 20-Round Extended Magazine

Pros

  • Fits the P99 perfectly and functions flawlessly
  • Numbered witness holes on the side for easy tracking
  • Powerful spring and reliable follower for proper feeding
  • High capacity magazine holds 20 rounds of 9mm ammo

Cons

  • Suitable for limited applications only
  • Extended portion hinders with movement 

What Recent Buyers Report

The recent customer reviews point out the reliable function of this extended magazine. The magazine features a powerful spring that feeds rounds flawlessly. The advertised capacity of the magazine is 100% true as it holds a full 20 rounds and inserts/ejects perfectly. 

Why it Stands Out to Us

The 20 round magazine is an OEM product that assures of its reliability and function. The magazine has been meticulously designed to Walther’s quality standards. Despite its capacity, the item feeds flawlessly and doesn’t cost too much to hurt your budget.

Who Will Use This Most

The item is purely intended for range use and fun shooting. Although some adventurous users can also find it to be a viable home defense gun with a rifle’s ammo capacity. The extended length and weight of this magazine make it clumsy to maneuver. Which in turn limits its applications. 

Bottom Line

The Walther 20 round extended magazine should be the first choice of P99 users when buying a 9mm extended mag. The magazine fits and functions perfectly. However, make sure to comply with your local gun laws before buying it. 

Pros

  • Excellent magazine for an amazing price
  • High capacity of 15 rounds for more firepower
  • Individually numbered witness holes for easy tracking
  • Durable stainless steel construction with a matte black finish

Cons

  • Follower may need to be replaced
  • Takes some time to break-in the spring

What Recent Buyers Report

Users report this item to be flawless and appreciate the high-quality metal construction. The mag fits perfectly and the price point is also an impressive factor for the buyers. Being a genuine Walther magazine, the badge of credibility and user support is also associated with this magazine. 

Why it Stands Out to Us

The product has been manufactured by Walther which assures the quality and perfect fit with the P99. The 15 round capacity is more than the normal 10 rounds and makes the magazine suitable for multiple purposes. Additionally, the stamped witness holes help the user to conserve and track ammunition. 

Who Will Use This Most

The item is perfect for self-defense and EDC. Especially by on-duty officers. The witness holes allow the user to track the ammunition quickly in the middle of a dangerous situation. Additionally, the magazine is great for range use and practice as the shooter doesn’t have to reload very often. 

Bottom Line

The Walther P99 magazine features a 15 round capacity which makes it a good choice for both training and tactical uses. The mag works flawlessly and features a durable construction since it is an OEM product. A good inexpensive option for people looking to buy high capacity P99 mags on a budget. 

Pros

  • Numbered witness holes on the side
  • Flawless functionality in all situations
  • High capacity of 16 rounds for extra firepower
  • Durable steel construction with polymer base and follower

Cons

  • Protrudes a bit which may affect the handling

What Recent Buyers Report

The 16 round P99 magazine has been widely appreciated by its users. People like its quality construction and flawless action. Plus it holds 16 rounds at full capacity as advertised by the manufacturer. Another very appreciated factor among buyers was the price of this magazine. 

Why it Stands Out to Us

A cut above than the previously mentioned 15 round mag. This 16 round magazine lets you carry one extra round and eliminates the need of adding a grip extension to the 15 round magazine. Additionally, the magazine saves you money you’d rather spend on buying extensions or separate mags. 

Who Will Use This Most

The magazine is perfect for people who like to carry extra ammunition without adding the bulk of multiple backup magazines. That extra round is a boon for panicky people who spew out bullets like a machine gun in a SHTF situation. Plus, the magazine is also good for range use and training. 

Bottom Line

The Walther 16 round magazine is an OEM product that assures its quality. The magazine fits and functions flawlessly. Having an extra round in the magazine won’t hurt, especially if the magazine is not burning a hole through your wallet. 

Best Walther P99 10 Round Magazine:
Walther P99 .40 S&W 10-Round Magazine

Pros

  • Tough and quick-to-detach polymer base plate
  • Manufactured by Walther to strict specifications
  • Holds 10 rounds of the powerful 40 S&W caliber
  • Durable stainless steel construction and matte black finish

Cons

  • Not very suitable for duty or self-defense
  • Doesn’t accept grip extension or any modifications

What Recent Buyers Report

Users appreciate the construction and finish of this magazine along with the fit and flawless feeding. The magazine is chambered in the 40 S&W and runs smoothly with the handgun. However, some users reported capacity issues with difficulties adding one extra round to the chamber. 

Why it Stands Out to Us

This magazine is a reliable replacement or backup for the P99 OEM magazine since it has been manufactured by Walther itself. The impeccable finish of the magazine and the witness holes on the sides are quite helpful. Plus the sturdy base plate with a finger rest helps with handling. 

Who Will Use This Most

This magazine is ideal for target practice and tactical drills. Additionally, the magazine can also be carried as a backup if you use a Walther P99 for active duty or self-defense. The flush fit and finger rest of the magazine makes it a viable component for training as well.

Bottom Line

The Walther P99 40 S&W 10 round magazine is a great backup and training magazine. It features a durable construction and quality finish with an ergonomic design to facilitate handling. The magazine is perfect for training, plinking, and practice. 

Best Walther P99 Extended Magazine:
Walther P99 .40 S&W 12-Round Magazine

Pros

  • Legged anti-tilt follower for reliable feeding
  • Rare high capacity magazine for Walther P99
  • Chambered in the powerful 40S&W for extra punch
  • Marked with witness holes and easy to disassemble
  • Solid stainless steel construction with polymer base plate

Cons

  • A small portion sticks out of the grip
  • Increases the overall weight of the gun

What Recent Buyers Report

The P99 12 round magazine is a rare find for most buyers. However, users seem content with the build quality and performance of the magazine. The magazine works exactly like the OEM 10 round mag and feeds perfectly. Another impressive feature of the magazine was the inexpensive price. 

Why it Stands Out to Us

This P99 12 round 40 S&W magazine is not very prevalent in the market. However, it still is a very viable addition to the P99, given its high capacity of the powerful 40 S&W calibers. The quality construction and reliable feeding of this magazine makes it a trustworthy component for all applications. 

Who Will Use This Most

The capacity and caliber of the magazine make it ideal for on-duty officers and self defense. The 40 S&W is a powerful round with amazing stopping power. Having two extra rounds than the normal capacity is definitely going to be a favorable factor for the wielder. Additionally, the magazine is also suitable for practice and tactical training. 

Bottom Line

The 12 round 40 S&W magazine is a must have product for a Walther P99 owner. It can either be used as the main magazine or as a backup to carry a couple of extra rounds. The quality construction, reliable feeding and fair pricing of the magazine make it a very suitable product. 

Types of Walther P99 Magazines

Factory and Aftermarket Mags

The Walther P99 has been and still is an active duty weapon for many police forces around the world. So the manufacturing of its components and parts falls under strict supervision. While there are plenty of different magazine variants manufactured by Walther for the P99. Other companies like Mec-Gar and Promag also manufacture magazines for the P99.

As you’ve already learned in this article that Walther manufactures compact, high capacity, and different caliber mags for the P99. These factory mags are considered to be more reliable and function properly with the handgun. Obviously due to the fact that they are manufactured by the OEM. 

Extended and Compact Mags

The Walther P99 magazines are available in different sizes. You can have a 10 round compact magazine, or a 15 round capacity magazine or even an extended 20 round magazine for your handgun. These magazines differ in size and affect the handling, weight, and accuracy of the weapon. 

Caliber

Walther P99 comes chambered in two different variations. The 9mm Parabellum and 40 S&W. Its magazines are also available in both these calibers. While the 9mm magazines can come in capacities as large as 20 rounds. The 40 S&W mags are available in a max capacity of 12 rounds. The difference is obviously due to the difference in size of the caliber. 

Conclusion

Walther P99 is a very popular duty firearm among many police forces of the world. A good and reliable magazine is a crucial necessity if you plan on using the P99 for peculiar defense purposes. You can choose between normal and extended capacity magazines depending upon your intended application. However, the OEM magazines are always a favorable option for many.

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