Kansas Gunshop is a Wichita, KS-based retailer specializing in firearms and accessories. The Walther P99 AS 40 S&W Centerfire Pistol is a reliable, duty-proven handgun known for its adaptable grip and smooth trigger. Its Anti-Stress (AS) trigger system offers a consistent pull for both target shooting and self-defense. Available now for $499.00.
Reviewed by Derek, Owner & FFL Holder at Kansas Gunshop. Kansas-licensed FFL dealer since 2008, NRA Range Safety Officer.
Last updated: April 2026
What are the specifications of the Walther P99 AS 40 S&W?
| Product Type | Centerfire Pistol |
|---|---|
| Caliber | .40 S&W |
| Action | AS (Anti-Stress) Trigger System, DA/SA |
| Frame Material | Polymer |
| Slide Material | Steel |
| Finish | Tenifer™ Black |
| Barrel Length | 4.0 inches |
| Overall Length | 7.1 inches |
| Height | 5.3 inches |
| Width | 1.3 inches |
| Weight (empty) | 24 oz |
| Capacity | 12+1 Rounds |
| Sights | 3-Dot Polymer, Adjustable Rear |
| Safety | Firing Pin Block, Decocker |
| Country of Origin | Germany |
| Condition | New |
| SKU | 2796460 |
What key features define the Walther P99 AS?
- AS (Anti-Stress) Trigger System: This system provides a consistent trigger pull for both the initial double-action shot and subsequent single-action shots, aiding in accuracy and control. It’s a design that’s been around for a while and proven itself.
- Interchangeable Backstraps: The P99 AS comes with different backstraps, allowing you to customize the grip to fit your hand. This is a practical feature for different shooters or for adapting to gloves.
- Ambidextrous Magazine Release: The paddle-style magazine release is integrated into the trigger guard and can be operated from either side, which is a plus for both left and right-handed shooters.
- Decocker Button: A flush-mounted decocker on the slide allows for safe decocking of the hammer without manipulating the trigger, a feature many prefer for carry.
- Accessory Rail: The integrated Picatinny-style rail on the frame allows for easy attachment of lights or lasers, which is standard on most modern duty pistols.
- Loaded Chamber Indicator: A visual and tactile indicator lets you know if there’s a round in the chamber, adding a layer of safety.
- Front and Rear Slide Serrations: These provide a secure grip for manipulating the slide, whether you’re chambering a round or clearing a malfunction.
Who should consider the Walther P99 AS 40 S&W Centerfire Pistol?
Buy it if:
- ✅ You’re looking for a reliable .40 S&W pistol with a proven track record for self-defense or duty use.
- ✅ You appreciate a consistent trigger pull across different modes, as offered by the AS system.
- ✅ You prefer a handgun with interchangeable backstraps to fine-tune the grip ergonomics.
- ✅ You want a pistol with ambidextrous controls, specifically the magazine release.
- ✅ You’re comfortable with the .40 S&W cartridge and its ballistics.
- ✅ You need an accessory rail for mounting lights or lasers.
- ✅ You’re a Walther enthusiast looking to add a classic to your collection.
Skip it if:
- ❌ You prefer a simpler, striker-fired trigger system without the DA/SA transition. See our Glock offerings for a more consistent pull.
- ❌ You’re looking for a compact pistol for deep concealment, as the P99 AS is a full-size handgun. Explore our concealed carry options.
- ❌ You’re sensitive to recoil; the .40 S&W can be snappier than 9mm. Consider a 9mm pistol if recoil is a concern.
- ❌ You require a pistol with a manual external safety lever. The P99 AS relies on internal safeties and a decocker.
How does the Walther P99 AS compare to other pistols?
| Feature | Walther P99 AS | Glock 22 Gen3 | Springfield Armory XD-40 Mod.2 |
|---|---|---|---|
| Material | Polymer Frame, Steel Slide | Polymer Frame, Steel Slide | Polymer Frame, Steel Slide |
| Quality | German engineering, duty-grade components | Renowned reliability, robust construction | Good value, comfortable ergonomics |
| Trigger System | AS (Anti-Stress) DA/SA | Safe Action (Striker-fired) | Striker-fired, Grip Safety |
| Ergonomics | Interchangeable backstraps, paddle mag release | Finger grooves, simple grip | GripZone texturing, interchangeable backstraps |
| Capacity (.40 S&W) | 12+1 | 15+1 | 12+1 or 16+1 (extended) |
| Price (Approx.) | $499.00 | $550-$600 | $450-$500 |
| Shipping | Same-day from Kansas Gunshop | Varies by retailer | Varies by retailer |
| Lifespan/Durability | Long-lasting with proper care | Known for extreme durability | Reliable for general use |
Frequently Asked Questions about the Walther P99 AS 40 S&W
Is the .40 S&W cartridge still relevant for self-defense?
While 9mm has seen a resurgence, the .40 S&W still offers a significant ballistic advantage in terms of energy and bullet mass. It remains a viable and effective cartridge for self-defense, particularly with modern ammunition designs. Many law enforcement agencies used it for years, and it’s still a capable round.
What is the difference between the P99 AS and other P99 variants?
The “AS” stands for Anti-Stress, referring to its unique trigger system that combines a double-action/single-action (DA/SA) pull with a consistent reset. Other P99 variants, like the QA (Quick Action) or DAO (Double Action Only), have different trigger mechanisms. The AS offers the ability to decock for a longer first pull, or carry cocked for a lighter first pull.
Can I convert the Walther P99 AS 40 S&W to a different caliber?
Generally, converting a .40 S&W P99 AS to 9mm is not officially supported by Walther due to differences in magazine well dimensions and potentially other components. While some aftermarket conversions exist, they are not factory-approved and may affect reliability or safety. It’s best to stick with the intended caliber.
What kind of maintenance does the Walther P99 AS require?
Standard pistol maintenance applies: regular cleaning and lubrication of the slide, barrel, and frame rails. Pay attention to the recoil spring assembly and ensure all components are free of debris. Follow the owner’s manual for detailed instructions. It’s a robust design, so basic field stripping and cleaning after each range trip will keep it running reliably.
Are magazines for the Walther P99 AS 40 S&W readily available?
Factory Walther P99 .40 S&W magazines are generally available, though sometimes they can be harder to find than 9mm magazines due to the .40’s decreasing popularity. It’s always a good idea to stock up on a few spares when you find them. Check our accessories section or contact us for availability.
Where can I buy centerfire pistols online?
You can buy centerfire pistols online right here at Kansas Gunshop (kansas-gunshop.com). We offer a selection of firearms, and once purchased, they are shipped to your local FFL dealer for transfer, following all federal and state laws. We make the process straightforward and compliant.
Is the Walther P99 AS suitable for competitive shooting?
While the P99 AS has a good trigger and ergonomics, it’s not typically a top choice for dedicated competitive shooting divisions like USPSA Production or IDPA Stock Service Pistol, where other platforms might offer more aftermarket support or specific advantages. However, for casual competition or as a reliable range gun, it performs well.
✅ Same-day shipping from Wichita, KS
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Browse more: Walther | Full Shop
Last updated: April 2026
Reviews
There are no reviews yet.