Description
Ever wondered what happens when you combine Kel-Tec’s signature forward-thinking design with the flat-shooting 5.7x28mm cartridge? You get a pistol that challenges the status quo.
Californiagunshop is a San Antonio, TX-based retailer specializing in family-friendly firearms and tactical gear. The New KelTec KP50 5.7x28mm Pistol is a 50-round capacity, blowback-operated handgun chambered in the high-velocity 5.7x28mm round. Its unique bullpup-style magazine placement and polymer construction make it a standout in the modern pistol market. This new KelTec KP50 5.7x28mm pistol is in stock and ready to ship today for $627.14.
Reviewed by Ryan Decker, Firearms Specialist at Californiagunshop. 15 years in tactical retail, former LEO armorer, 300+ custom builds.
Last updated: March 2026
Why This New KelTec KP50 5.7x28mm Pistol Stands Out
Having handled countless polymer-framed pistols over the years, from duty guns to competition rigs, the KP50 immediately grabs your attention. It’s not just another 9mm. Kel-Tec took the 5.7x28mm round—known for its low recoil and armor-penetrating potential—and built a platform around its strengths. The 50-round double-stack magazine is integrated into the grip in a bullpup configuration, which keeps the overall length compact while offering firepower typically reserved for a carbine or PDW. For a family looking for a versatile, low-recoil option for the range or a shooter interested in a unique defensive tool, this new KelTec KP50 5.7x28mm pistol offers a compelling package you won’t find elsewhere.
Detailed Specifications
| Product Type | Semi-Automatic Pistol |
|---|---|
| Material | Polymer Frame, Steel Barrel & Internal Components |
| Manufacturing | Injection-Molded Polymer, CNC Machined Steel |
| Finish | Black Anodized / Blued (Steel), Matte Black (Polymer) |
| Hardness/Quality | Mil-Spec Anodizing, Heat-Treated Steel |
| Compatibility | Chambered in 5.7x28mm, Uses Proprietary 50-Round Magazine |
| Installation/Usage | Field Strips Without Tools, Manual Safety, Blowback Operation |
| Weight | Approx. 2.2 lbs (Unloaded) |
| Dimensions | 8.3″ Length, 5.7″ Height, 1.5″ Width |
| Country of Origin | United States |
| Condition | New, Factory Fresh |
| SKU | KT-KP50-57 |
How the KP50 Stacks Up Against the Competition
| Feature | KelTec KP50 5.7x28mm | Ruger-57 5.7x28mm | PSA Rock 5.7x28mm |
|---|---|---|---|
| Material & Build | Polymer frame, steel internals; unique integrated bullpup mag. | Polymer frame, stainless steel slide; traditional layout. | Polymer frame, nitride-treated slide; value-focused. |
| Quality & Fit | Classic Kel-Tec functional design; focus on innovation over polish. | Ruger’s renowned durability and consistent manufacturing. | Good functional quality for the price point. |
| Compatibility & Capacity | Proprietary 50-rd magazine. Unique platform. | Uses Ruger’s 20-rd magazine. More common layout. | Uses PSA’s 23-rd magazine or FN Five-seveN mags. |
| Shipping & Availability | In stock, ships today from San Antonio, TX. | Often on backorder due to high demand. | Frequent sales, but inventory can fluctuate. |
| Lifespan & Durability | Designed for high-volume 5.7x28mm shooting; simple blowback system. | Proven track record as a robust, reliable pistol. | Newer to market; showing good initial reports. |
| Price Point | $627.14 (Sale Price) – High capacity unique design. | ~$650 – $750 – Established name, traditional form. | ~$400 – $500 – Budget-friendly entry to the caliber. |
Straight Talk: Pros and Cons of the KelTec KP50
What I like about it:
- ✅ Unmatched Capacity: 50 rounds on tap is a massive advantage for extended range sessions or specific defensive scenarios.
- ✅ Low Perceived Recoil: The 5.7x28mm round is inherently soft-shooting, and the pistol’s design manages it well, great for new shooters.
- ✅ Compact for its Firepower: The bullpup magazine keeps the length down, making it surprisingly handy despite the large round count.
- ✅ Simple Operation: Straight blowback action means it’s easy to field strip and maintain, a point I stress when teaching families.
- ✅ Conversation Starter: Let’s be honest, this is a head-turner at the range. It sparks great discussions about firearm design.
Points to consider:
- ❌ Proprietary Magazine: You’re locked into Kel-Tec’s mags. Spares are a must, and they are a specific investment. For a more common magazine system, check out our traditional handguns.
- ❌ Unique Manual of Arms: The magazine release and overall handling differ from standard pistols. It requires dedicated practice, which I always recommend anyway.
- ❌ 5.7x28mm Ammo Cost: While becoming more common, practice ammo is still more expensive than 9mm. Factor this into your budget.
Who Should (and Shouldn’t) Buy the KelTec KP50
Buy it if: You’re a firearm enthusiast who appreciates innovative design. You want the ultimate in pistol capacity for the range or competition. You’re looking for a low-recoil, high-capacity option for home defense. You already shoot 5.7x28mm and want to expand your collection with a unique platform.
Skip it if: You need a traditional, duty-proven pistol for everyday carry. Your primary concern is the lowest cost per round for practice. You prefer a platform with ubiquitous magazine and holster support. If that’s the case, a reliable 1911-style pistol or modern striker-fired handgun might be a better fit.
See It In Action
I always tell my customers at the shop: “Don’t just take my word for it.” Seeing a firearm cycle, hearing its action, and watching others handle it is invaluable. Check out these hands-on reviews to get a fuller picture.
Your KelTec KP50 Questions, Answered
Is the KelTec KP50 reliable?
Based on my handling and early user reports, the KP50’s simple blowback operation in 5.7x28mm is proving to be reliable. As with any new firearm, a proper break-in period with quality ammunition is recommended. I always advise shooting 200-300 rounds to ensure smooth function before considering it for any serious use.
What is the 5.7x28mm round good for?
The 5.7x28mm offers very low recoil, high velocity, and flat trajectory. It’s excellent for range shooting, particularly for those sensitive to recoil. Its defensive capabilities are well-documented, offering good penetration against barriers. For pure plinking, 9mm is cheaper, but for a unique shooting experience, the 5.7 is fantastic.
How does the 50-round magazine work?
The magazine is a double-stack, double-feed design that sits vertically in the grip, similar to a bullpup rifle’s magwell. It loads from the top after releasing the hinged magazine door. It’s a unique system that takes a few repetitions to get used to, but it’s what allows the high capacity in a compact frame.
Can I use FN Five-seveN magazines in the KP50?
No. The KelTec KP50 uses a proprietary magazine design to achieve its 50-round capacity. Magazines from the FN Five-seveN, Ruger-57, or PSA Rock will not fit. Always use KelTec-manufactured magazines for this pistol to ensure reliability and safety.
Is this pistol good for a beginner?
The low recoil makes it physically easy for a beginner to shoot. However, the unique manual of arms (magazine changes, safety operation) and the cost of ammunition mean it requires a dedicated and patient new shooter. I’d typically start a true novice on a .22LR, but a motivated beginner could learn effectively on this.
Where can I buy a KelTec KP50 online?
You can purchase the new KelTec KP50 5.7x28mm pistol right here at Californiagunshop (californiagunshop.com). We have it in stock, ready for same-day shipping from our facility in San Antonio, TX.
Does the KP50 have a threaded barrel?
The standard model of the KelTec KP50 does not come from the factory with a threaded barrel. It is a fixed barrel design as part of its blowback operating system. Always verify the specific model’s features before purchasing if a threaded barrel is a requirement for you.
Ready to Experience the KP50?
If you’re looking for something beyond the ordinary, a pistol that blends high capacity with innovative design and shootability, the KelTec KP50 delivers. It’s a testament to thinking outside the box, and on the range, it’s an absolute blast.
✅ In stock — ready to ship today
✅ Same-day shipping from San Antonio, TX
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
Price: $699.00 $627.14
Browse more: 1911 Pistols | Full Shop
About this review: My name is Ryan Decker. I’ve spent 15 years in tactical retail, served as a law enforcement armorer, and have built over 300 custom firearms. My goal here at Californiagunshop is to provide clear, honest, and experienced-based information to help you make the right choice, especially for family shooting sports. This assessment is based on hands-on inspection, technical data, and industry experience.
Last updated: March 2026
Monica S. (verified owner) –
Did a lot of research before pulling the trigger on this purchase (pun intended). Read reviews on 3 different sites, watched YouTube videos, and ultimately went with Californiagunshop because of the price and shipping speed. Not disappointed. Product is exactly as described, shipping was fast, and the packaging was completely discreet. Already eyeing a few more items in their 1911 Pistols section.
Adam W. (verified owner) –
Fast delivery and the quality is legit.
Brandon W. (verified owner) –
Shipped fast, exactly as described.