KelTec KP50 5.7×28mm – 50-Round Pistol

Ever wondered what it would be like to have a handgun with the magazine capacity of a rifle, chambered in a round that’s been turning heads for years? That’s exactly the question KelTec answered with their latest release.

Imbertsmithersarms is a Grand Forks, ND-based retailer specializing in firearms for hunters, outdoorsmen, and the concealed carry lifestyle. The KelTec KP50 5.7×28mm – 50-Round Pistol is a high-capacity, futuristic handgun built around the potent 5.7×28mm cartridge. Its defining feature is a massive 50+1 round capacity, housed in a unique bullpup-style design. In stock and ready to ship to your FFL for $791.12.

Why This KelTec KP50 Stands Out

I’ve handled a lot of pistols over the years, from classic 1911s to modern polymer-framed wonders. The KP50 isn’t trying to be any of those. KelTec has a reputation for thinking outside the box, and this is a prime example. The 5.7×28mm round itself is a big part of the draw—it offers low recoil, high velocity, and excellent penetration, making it a favorite for certain defensive roles. Pairing that with a 50-round magazine transforms the pistol from a personal defense tool into something with serious sustained firepower. For the budget-conscious shooter looking for maximum rounds on tap in a compact package, this is a compelling option that you won’t find from any other manufacturer right now.

KelTec KP50 5.7×28mm – 50-Round Pistol Specifications

How Does the KP50 Stack Up Against Other 5.7×28mm Options?

When you’re looking at the 5.7×28mm pistol market, you have a few main players. Let’s see how the KelTec KP50 compares head-to-head.

Feature	KelTec KP50	FN Five-seveN MRD	Ruger-5.7
Material & Build	Polymer frame, steel slide. Futuristic, utilitarian KelTec design.	High-quality polymer, refined fit and finish. Military heritage.	Rugged polymer frame, stainless steel slide. Classic Ruger durability.
Quality & Feel	Functional and unique. Built for a specific high-capacity purpose.	Premium, duty-ready feel. Excellent ergonomics and trigger.	Solid, reliable, and straightforward. Great out-of-the-box shooter.
Compatibility	Proprietary 50-rd magazine. Uses widely available 5.7×28mm ammo.	Proprietary 20-rd mags. Aftermarket support is growing.	Uses its own 20-rd mags. Good aftermarket holster support.
Capacity	50+1 Rounds – Its defining advantage.	20+1 Rounds	20+1 Rounds
Price Point	$791.12 – High value per round capacity.	~$1,300+ – Premium tier pricing.	~$800 – $900 – Direct price competitor, different concept.
Best For	Maximum ammo on tap, range fun, unique collection piece.	Duty use, premium defensive pistol.	All-around reliable 5.7 platform, great first 5.7 pistol.

KelTec KP50: The Good and The Honest Truth

Based on the specs and KelTec’s track record, here’s what you can expect.

Pros:

• ✅ Unmatched Capacity: 50+1 rounds in a handgun is a game-altering feature for range sessions or specific defensive scenarios.
• ✅ 5.7×28mm Performance: You get the low recoil, flat trajectory, and armor-penetrating potential of the cartridge.
• ✅ Compact for its Capacity: The bullpup-style design keeps the overall length manageable despite the large magazine.
• ✅ Budget-Conscious Entry to 5.7: At this sale price, it offers a lot of firepower for the dollar compared to other 5.7 platforms.
• ✅ Conversation Starter: This is a unique piece that embodies KelTec’s innovative spirit.

Cons:

• ❌ Bulk & Concealability: The wide magazine makes this a range or open-carry piece, not a concealed carry gun. If you need a concealable pistol, see our concealed carry handguns.
• ❌ Proprietary Magazine: You’re reliant on KelTec for spare mags, which might be scarce initially. Plan your ammo loading accordingly.
• ❌ Ergonomics May Vary: The unique grip angle and feel won’t suit everyone. It’s best handled before you buy if possible.

Who Should (and Shouldn’t) Buy the KelTec KP50

Buy the KelTec KP50 if:

• You’re a 5.7×28mm enthusiast wanting the highest-capacity pistol available.
• You value round count above all for range fun or competition.
• You’re a KelTec collector or fan of innovative firearm designs.
• You want a potent tool for vehicle or property defense where size is less critical.
• You’re looking for a cost-effective way to get into the 5.7×28mm world with a major twist.

Consider another option if:

• Concealed carry is your primary goal. Look at compact 9mms or .380s.
• You prefer a traditional pistol ergonomic and manual of arms. The Ruger-5.7 or FN Five-seveN would be better fits.
• You’re on a very tight budget and 5.7×28mm ammo cost is a concern. A 9mm pistol will be far cheaper to feed.

Common Questions & Concerns About the KP50

Is the 5.7×28mm round good for self-defense?
Yes, it can be very effective. It offers high velocity, good penetration, and low recoil, making follow-up shots easier. However, ammunition selection is crucial—look for rounds designed for defensive use.

How reliable is the KelTec KP50 likely to be?
KelTec firearms are known for innovative designs that are generally functional and reliable. As a new model for 2026, widespread long-term data isn’t available yet, but KelTec stands behind their products. The simple blowback operation is a proven system.

Is 5.7×28mm ammo expensive and hard to find?
It’s more expensive than 9mm, but prices have come down significantly as more guns chambered for it hit the market. It’s readily available online and at most larger sporting goods stores now, unlike a few years ago.

Can I mount an optic on the KP50?
The base model shown comes with fixed sights. It does not appear to have an optics-ready cut from factory photos. For an optics-ready 5.7 pistol out of the box, you’d want to look at the FN Five-seveN MRD model.

What’s the real-world use for a 50-round pistol?
For most civilians, it’s about the fun and novelty factor at the range. It could also serve as a formidable tool in a defensive situation where retreat isn’t an option, or for rural property defense.

Frequently Asked Questions

If the idea of a 50-round 5.7×28mm pistol sparks your curiosity, the KelTec KP50 is your only option. It’s a bold, functional piece of engineering that delivers immense firepower in a handgun-sized package. At under $800, it represents a unique value in the growing 5.7×28mm ecosystem.

Ready to experience the next step in high-capacity handguns? Add the KelTec KP50 to your cart. The process is simple: purchase online, we ship discreetly to your chosen FFL, you complete the transfer with them. Have questions before you buy? Our product listings have all the details you need to make an informed decision.

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