Kel-Tec P50

50 Rounds of 5.7x28mm: The Core Concept

The P50’s fundamental premise is maximum 5.7x28mm capacity in a pistol-legal configuration. The gun feeds from standard FN PS90 magazines — the 50-round translucent polymer magazines that sit horizontally across the top of the receiver in a bullpup layout. This PS90 magazine compatibility is immediately practical: PS90 mags are widely available and affordable, so the P50 owner has access to an established magazine supply without hunting for proprietary alternatives. Starting with 50 rounds of the 5.7’s flat-trajectory, high-velocity cartridge changes what’s possible from a pistol in ways that are difficult to fully appreciate until you’ve run one.

Bullpup Configuration: How the P50 Achieves Its Compact Length

The P50 uses a bullpup layout — the magazine and action sit behind the trigger group — which allows the 9.6” barrel to fit in an overall package shorter than many conventional pistols with half that barrel length. The horizontal magazine sits across the top of the receiver, giving the P50 its distinctive profile. The charging handle is located on the left side, and the pistol fires from a closed bolt for accuracy. The layout takes some adjustment for shooters accustomed to conventional pistols, but the ergonomics are designed around the horizontal magazine’s geometry and most shooters find the P50 handles naturally after a brief familiarization period.

9.6” Threaded Barrel: Velocity and Suppressor Benefits

The P50’s 9.6” barrel extracts substantial velocity from 5.7x28mm ammunition — significantly more than the FN Five-seveN’s 4.8” barrel or the Ruger-57’s 4.94”. The longer barrel also makes the P50 an exceptional suppressor host, with the 5.7’s naturally suppressor-friendly ballistics performing at their best from a longer barrel. The threaded muzzle ships standard, accepting common suppressor thread pitches. A subsonic-loaded, suppressed P50 produces one of the more unique and enjoyable range experiences available — 50 rounds of hearing-safe 5.7 from a compact bullpup pistol.

PS90 Magazine Compatibility: Practical Logistics

The P50’s use of FN PS90 magazines is one of its most practical design decisions. The PS90 has been in production for decades, and its 50-round magazines are sold by virtually every major firearms retailer. Owners of FN PS90 carbines gain complete magazine interoperability with the P50 — one magazine platform serves both guns. The translucent polymer construction allows instant round-count verification. Standard PS90 magazines are available in 10, 30, and 50-round configurations depending on state magazine capacity laws, giving P50 owners compliance options without requiring proprietary restricted-capacity magazines.

Who the P50 Is Built For

The P50’s audience is specific but enthusiastic: 5.7x28mm enthusiasts who want maximum capacity from the cartridge, PS90 owners who want a pistol companion to their carbine, suppressor owners who want a distinctive 50-round suppressed host, and shooters who want something genuinely unlike anything else on the market. It’s not a carry gun, a home defense gun in any conventional sense, or a competition pistol. It’s a statement piece and a range experience — one of the few production pistols that consistently generates a crowd at the range regardless of what else is on the table.

KP50: The Updated Designation

Kel-Tec markets the P50 under the KP50 designation in current production and retail channels — if you’ve seen the KP50 referenced online, in reviews, or in viral content, it is the same firearm as the P50. The KP50/P50 designation refers to the same bullpup 5.7x28mm pistol with the 50-round PS90-compatible magazine. No mechanical changes distinguish the KP50 designation from earlier P50 production; the name update reflects Kel-Tec’s product lineup standardization.

The Jungle Clip: Double Magazine Configuration

The Kel-Tec P50/KP50 has become particularly popular with a modification known informally as the “Jungle Clip” — two 50-round magazines joined side by side with a coupler, providing 100 rounds of 5.7x28mm accessible without a full reload. The PS90-compatible magazine design and the P50’s top-feed bullpup layout make this configuration practical in a way that would be unwieldy on most pistol platforms. The resulting 100-round configuration is one of the most striking and recognizable setups in the current rimfire and pistol caliber shooting community and is a significant driver of the P50’s social media presence and buyer interest. Magazine couplers for PS90-pattern magazines are available from aftermarket accessory manufacturers.

Frequently Asked Questions: Kel-Tec P50 / KP50

What is the difference between the Kel-Tec P50 and KP50?
The P50 and KP50 are the same firearm. Kel-Tec updated the product designation to KP50 in current marketing and retail channels. No mechanical differences exist between the P50 and KP50 designations — both refer to the same bullpup 5.7x28mm pistol with a 50-round PS90-compatible magazine.

What is the "Jungle Clip" on the Kel-Tec P50?
The Jungle Clip is an informal term for two PS90-pattern 50-round magazines joined side by side with an aftermarket coupler, providing 100 rounds of 5.7x28mm without a full reload. The P50’s PS90 magazine compatibility and top-feed bullpup layout make this configuration popular and practical.

Does the Kel-Tec P50 use PS90 magazines?
Yes. The P50/KP50 uses the same 50-round magazine as the FN PS90, which significantly expands the available magazine supply and makes aftermarket high-capacity and jungle-clip configurations practical. Factory FN PS90 magazines and aftermarket PS90-pattern magazines both function in the P50.

Is the Kel-Tec P50 good for suppressed use?
Yes. The P50 ships with a 9.6-inch threaded barrel and the 5.7x28mm cartridge is available in subsonic loadings. The bullpup layout keeps the overall length manageable with a suppressor attached. The combination of subsonic 5.7x28mm and the P50’s threaded barrel makes it a capable suppressor host.

What caliber is the Kel-Tec P50?
The Kel-Tec P50/KP50 is chambered in 5.7x28mm — the same cartridge used in the FN PS90 and FN Five-seveN. It fires from a 50-round magazine compatible with the PS90.

See Also: Kel-Tec PR57 • FN PS90 • 5.7x28mm Ammo • Suppressors & NFA • Pistol Caliber Carbines

Related Pages at Impact Guns

See the full Kel-Tec brand page. For 5.7x28mm comparisons see the Ruger-57 and Kel-Tec PR57. The Ruger LC Carbine in 5.7 is a natural companion. For ammunition see our 5.7x28mm ammo page.