Last updated: March 2026
The KelTec KP50 is a 5.7x28mm semi-automatic pistol with a 50+1 round capacity, currently priced at $899 at White’s Arms in Salt Lake City. It features a bottom-insert drop-free magazine, B5 grip, and foldable design — making it one of the most distinctive high-capacity pistols on the market today.
What Is the KelTec KP50?
Walk into our shop and ask about the KP50, and you’ll probably get a crowd gathering around the display case. This pistol turns heads — not just because of its futuristic silhouette, but because that 50-round magazine capacity is genuinely unlike anything else you’ll hold in a pistol-caliber platform at this price point.
KelTec built the KP50 around the 5.7x28mm cartridge, the same round used in the FN Five-seveN and the PS90 PDW. It’s a flat-shooting, low-recoil round that punches well above its physical size. Pair that with a 50-round flush-fit magazine and a polymer frame with a B5 Systems grip, and you’ve got something genuinely interesting.
We’ve sold quite a few of these at White’s Arms, and the questions are always the same: Is it reliable? Is it worth the price? And what on earth do you do with 50 rounds in a handgun? Let me answer all of those.
KelTec KP50 Full Specs
| Specification | Detail |
|---|---|
| Caliber | 5.7x28mm |
| Capacity | 50+1 rounds |
| Action | Semi-automatic, delayed blowback |
| Barrel Length | 8 inches (with suppressor threading) |
| Overall Length | 18.5 inches (unfolded), 10 inches (folded) |
| Weight (unloaded) | Approx. 3.5 lbs |
| Frame Material | Polymer with B5 Systems grip |
| Magazine Type | Bottom-insert, drop-free |
| Folding Stock | Yes — folds for compact carry |
| Jungle Clip Compatible | Yes — links two mags for 100 rounds |
| MSRP | $899 |
| Made In | USA (Cocoa, FL) |
Design & Ergonomics
The KP50’s most noticeable design feature is that bottom-insert magazine — it loads from directly below the trigger group, similar to a traditional SMG layout. It’s unusual, but it works. Drop-free is reliable in testing, and the B5 grip gives you a lot of control over a platform that, let’s be honest, looks a bit like a prop from a sci-fi film.
The folding capability is genuinely useful. Fold it up and it’s compact enough to fit in a backpack or a larger range bag. Unfold it and you’ve got a stable, manageable shooting platform. The 8-inch threaded barrel adds suppressor compatibility for those who want to run it that way.
Shooting the KP50: Range Experience
The 5.7x28mm cartridge is low-recoil by design. Through the KP50’s longer barrel compared to pistols like the FN Five-seveN, you get good velocity and flat performance. Follow-up shots are easy, and managing 50 rounds in a controlled shooting session is honestly a lot of fun.
The delayed blowback action keeps things smooth. We’ve run several hundred rounds through our demo unit without a malfunction, using standard FN-manufactured 5.7 ammunition. KelTec recommends quality factory ammo for reliability, which is standard advice for any 5.7 platform.
If you’re comparing the KP50 to other high-capacity pistols, you’ll want to check out our KelTec KP50 product page for current availability and pricing.
Who Is the KP50 For?
This isn’t a concealed carry gun — that 18.5-inch unfolded length makes it a range toy, a home defense option, or a collector’s piece. Here’s who tends to buy it:
- Range enthusiasts who want something genuinely different and conversation-starting
- 5.7x28mm fans who already have an FN PS90 or Five-seveN and want a companion piece
- Home defense buyers who want high capacity and low recoil in a stabilized platform
- Collectors who appreciate KelTec’s history of unusual, innovative designs
Pros & Cons
| ✅ Pros | ❌ Cons |
|---|---|
| 50+1 round capacity is unmatched at this price | 5.7x28mm ammo costs more than 9mm |
| Low recoil — easy on newer shooters | Not suitable for concealed carry |
| Jungle Clip doubles capacity to 100 rounds | Unusual manual of arms takes practice |
| Foldable for compact storage | Limited holster options |
| Threaded barrel suppressor-ready | Front-heavy when fully loaded |
| Made in the USA | Polarizing aesthetics |
KP50 vs. The Competition
The KP50’s main 5.7mm competitor is the Ruger-57 at around $649. The Ruger offers a more traditional pistol layout and better ergonomics for most hands, but you sacrifice the 50-round capacity. If you want more than 20 rounds in a 5.7mm pistol, the KP50 is the only game in town at this price point.
You might also consider the SIG P365 FUSE Comp if you’re set on a high-performance pistol but want something more carry-friendly in 9mm, or the S&W M&P9 M2.0 Metal for a full-size duty-style option.
Safety Considerations
At White’s Arms, we always emphasize safe handling. The KP50 has a manual safety and a trigger safety. With 50 rounds on board, it’s critical to be intentional about muzzle direction and trigger discipline. We strongly recommend new owners take a basic firearms safety course before heading to the range. The KP50’s unusual form factor means the manual of arms is different from a conventional pistol — know your controls before you load.
Where to Buy the KelTec KP50
We carry the KP50 at White’s Arms in Salt Lake City, UT. You can check current availability and order online through our KelTec KP50 product page. At $899, it’s priced competitively for what you’re getting: a genuine 50-round, American-made, 5.7x28mm pistol platform that’s hard to find elsewhere.
Frequently Asked Questions
Is the KelTec KP50 legal in all states?
The KP50 may be restricted in states with magazine capacity limits (California, New York, Colorado, etc.). Always check your local laws before purchasing. The standard 50-round magazine exceeds limits in many jurisdictions. Compliant-capacity magazines may be available from third parties.
What ammo does the KP50 use?
The KP50 chambers 5.7x28mm. FN-manufactured loads (SS195, SS197) are the most widely available. Speer and Elite Ammunition also produce 5.7x28mm rounds. Avoid steel-case ammunition for best reliability.
Can you use the KP50 for home defense?
Yes — many buyers do. The low recoil, high capacity, and stabilizing folding design make it manageable in high-stress situations. Overpenetration is a consideration; use quality defensive loads designed for the caliber.
What is the Jungle Clip?
The Jungle Clip is an accessory that links two 50-round magazines together end-to-end, giving you 100 rounds before a reload. It’s a range toy and a conversation piece — not a serious tactical accessory, but undeniably entertaining.
Is the KP50 reliable?
Generally yes, with quality factory ammunition. Like all KelTec products, initial reliability improved as the platform matured. Current production units have a solid track record with FN and Speer 5.7mm loads.
