Description
What Pistol Gives You 50 Rounds of 5.7x28mm Ready to Go?
The answer is a short list — and for most of its history, that list was essentially the KelTec P50, a top-fed pistol that required you to flip the gun to insert a magazine. The KP50 changes the equation. KelTec redesigned the magazine system from the ground up for the KP50, replacing the top-hinged P50 arrangement with a conventional bottom-insert drop-free 50-round magazine. You get the same 50-round 5.7x28mm capacity in a pistol that handles like a standard firearm. That matters more than it sounds at first.
Quick Answer
The KelTec KP50 is a semi-auto blowback pistol chambered in 5.7x28mm with a 50+1 capacity bottom-insert drop-free magazine, rear Picatinny rail, B5 Systems grip, integrated QD sling cup, and side-folding capability. An optional Jungle Clip accessory pairs two magazines for 100 rounds total capacity. Released February 2026. Sale price: $791.12.
What Makes the KP50 Stand Out
Start with the magazine. The original KelTec P50 used a top-hinged magazine that sat along the top of the pistol — a clever engineering solution but one that required a specific handling technique and created some holster and accessory compatibility challenges. The KP50’s 50-round magazine inserts from the bottom, like virtually every other pistol on the market. Drop-free means when you hit the release, it falls clear without pulling it out. For timed drills or any scenario where a fast reload matters, conventional bottom-insert drop-free function is meaningfully faster and easier to learn than top-fed alternatives.
The 5.7x28mm cartridge is the other side of the equation. It’s a bottlenecked rifle-caliber round developed by FN for the P90 PDW and Five-seveN pistol. Standard 5.7x28mm produces high velocity with low felt recoil — typical loads run 1,800–2,000 fps from a longer barrel, with flatter trajectory than 9mm. In a pistol platform with a 50-round magazine, you’re looking at a high-capacity defensive or recreational option that doesn’t punish the shooter with significant muzzle rise. The KP50’s blowback semi-auto action manages the cartridge well in this configuration.
The rear Picatinny rail accepts lights, lasers, and accessories that mount to standard rail sections — positioned at the rear of the pistol rather than a forward underbarrel rail. This is intentional for the KP50’s ergonomic design, keeping accessories accessible without adding forward weight that would throw off balance with a 50-round magazine already installed. The B5 Systems grip is a proven accessory component — B5 makes grips for mil-spec AR-15s, and their texture and geometry translate well to the KP50’s control interface.
The integrated QD sling cup is a detail that signals KelTec’s thinking about how this pistol would actually be used. A 50-round 5.7x28mm pistol isn’t a pocket carry gun — it’s a range companion, a vehicle gun, or a recreational shooting tool that benefits from being slung when not firing. QD sling attachment built into the frame means no aftermarket hardware, no adapter, no jury-rigged solution. The side-folding capability reduces the pistol’s stored footprint further, which matters when you’re stowing it in a bag or vehicle console.
The optional Jungle Clip accessory — a physical coupler that joins two magazines side by side — brings your total ready capacity to 100 rounds of 5.7x28mm. That’s a recreational shooting option few pistols in any caliber can match. Two magazines drop-free from the same pistol without any tool or loose magazine to track. For a range day with newer shooters who spend more time shooting than reloading, that’s an experience-changing feature.
Specifications
| Spec | Detail |
|---|---|
| Caliber | 5.7x28mm |
| Action | Semi-auto blowback |
| Capacity | 50+1 (optional Jungle Clip: 100 rounds) |
| Magazine System | Bottom-insert drop-free 50-round |
| Rail | Rear Picatinny |
| Grip | B5 Systems |
| Sling Attachment | Integrated QD sling cup |
| Folding | Side-folding design |
| Optional Accessory | Jungle Clip (pairs 2 mags = 100 rounds) |
| Sale Price | $791.12 |
| Released | February 24, 2026 |
How It Compares
The Hi-Point 9mm Hush-Point is another high-capacity pistol option at a very different price point and with a completely different design philosophy — fixed barrel, heavy frame, budget-focused. The KP50 targets a different buyer: someone interested in a high-capacity recreational or defensive pistol in a boutique caliber, with engineering features (QD sling, B5 grip, folding) that suggest serious use. For 50-round 5.7x28mm capacity in a conventional bottom-insert pistol format, the KP50 is essentially without direct competition in its class at launch.
Honest Pros and Cons
Pros:
50-round drop-free bottom-insert magazine is a genuine engineering improvement over the P50’s top-fed design, and no direct competitor offers equivalent 5.7x28mm capacity in a pistol format. The B5 Systems grip and integrated QD sling cup are quality components that don’t require aftermarket upgrades. The Jungle Clip option makes 100-round range sessions a reality for recreational use.
Cons:
5.7x28mm ammunition is more expensive and less universally available than 9mm, .40 S&W, or .45 ACP — plan to pay a premium per round and stock up when you find it. A 50-round magazine makes this pistol large and heavy when fully loaded — it’s not a concealed carry option by any reasonable definition, and holsters are not a standard catalog item for this platform. The rear Picatinny rail positioning may not fit every light or laser accessory you already own.
Frequently Asked Questions
Is 5.7x28mm ammunition easy to find in Salt Lake City?
Availability has improved significantly since FN’s patents on the original 5.7x28mm chambering expired, with multiple manufacturers now producing this cartridge. It’s more available than it was five years ago but still less common than 9mm at most retailers. We carry 5.7x28mm ammunition at White’s Arms — call ahead to confirm current stock before a range trip.
How heavy is the KP50 with a full 50-round magazine?
KelTec hasn’t published exact loaded weights at launch, but a 50-round magazine of 5.7x28mm (approximately 40 grams per round) adds roughly 4.4 lbs of ammunition weight to the pistol’s unloaded weight. Plan on handling this as a two-hand pistol at all times when loaded — it’s not a one-hand carry gun with a full magazine.
Does the KP50 work with P90 magazines?
No. The KP50 uses a proprietary bottom-insert 50-round magazine designed specifically for this pistol. FN P90 magazines use a horizontal top-loading design that’s not compatible with the KP50’s magazine well. KelTec’s existing P50 magazines also do not interchange with the KP50 due to the completely redesigned feed system.
Is the KP50 legal to own in Utah without any special permits?
Yes. The KP50 is a semi-auto pistol. Utah has no magazine capacity restrictions, no suppressor registration requirements beyond federal NFA rules, and no pistol configuration restrictions that would affect this firearm. If you’re in another state, check your local laws — high-capacity magazines are restricted in several states.
What’s the practical use case for a 50-round pistol — is this just a range toy?
Honestly, range use is where most KP50s will spend their time, and that’s fine. It’s an exciting, low-recoil, high-capacity platform that makes for memorable range sessions. The integrated QD sling and B5 grip suggest KelTec also designed it for vehicle defense or property security where access time matters and high capacity is a genuine advantage. It’s not a concealed carry option, and nobody should represent it as one.
Pick Up the KP50 While Stock Lasts
The KelTec KP50 is in stock at White’s Arms for $791.12. If you’re comparing it to other semi-auto pistols in our catalog, check out the Rost Martin RM1S Comp 9mm for an optics-focused compact option, or browse the full semi-auto pistols and handguns categories. Have questions about 5.7x28mm ammo availability or accessories? We’re happy to talk through it — that’s what we’re here for.
Last updated: March 2026. Specs sourced from KelTec manufacturer documentation released February 24, 2026.
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