The Kel-Tec P50 is a 5.7x28mm semi-automatic pistol with a 50+1 round capacity. The magazine mounts horizontally above the barrel in a bullpup-style configuration, which is what makes that capacity possible in a package 15 inches long and 3.2 lbs. Two magazines are included. The OD Green polymer frame and 9.6-inch barrel are the defining physical features. 
 

Key Specifications 

• Brand: Kel-Tec 
• Model: P50 
• Caliber: 5.7x28mm 
• Action: Semi-Auto 
• Capacity: 50+1 RD 
• Barrel Length: 9.6" 
• Overall Length (OAL): 15" 
• Weight: 3.2 lbs 
• Sights: Optic Ready 
• Grip Material: OD Green Polymer 
• Includes Magazines: Yes (2 included) 
   

Detailed Features 

 
The horizontal magazine design is what separates the P50 from everything else in its price range. The FN P90-pattern 50-round magazine sits flat along the top of the action, feeding downward through a 90-degree turn. It's an unusual system, but it works. 
 
The slide is optic-ready without any additional machining. The 5.7x28mm cartridge is notable for low recoil relative to its velocity, which makes the P50 easy to control despite the high capacity. The 9.6-inch barrel maximizes the cartridge's velocity. 
 

Usage 

• Competition shooting: the 50-round capacity reduces reloads dramatically in high-round-count events. 
• Home defense: the capacity and low recoil combination are practical for defensive use. 
• Range use: the FN Five-seveN magazine platform means 5.7x28mm ammunition is widely available.

The P50 generates enthusiastic discussion, mostly centered on its unusual design and the novelty of 50+1 capacity in a pistol.

What users like:

• The magazine design gets consistent attention -- the FN P90-compatible 50-round horizontal magazine is genuinely unusual and draws interest at the range.
• High capacity without bulk: 50+1 rounds in a 3.2 lb, 15-inch package is hard to match.
• Low recoil from the 5.7x28mm cartridge makes it manageable despite the capacity.
• Optic-ready out of the box at the price point is appreciated.

Common complaints:

• Ergonomics: the grip angle and overall shape are polarizing -- some users find it uncomfortable compared to conventional pistols.
• Reliability concerns appear occasionally, particularly around feeding with certain ammunition types.
• Aftermarket accessories are limited compared to more established platforms.
• Price relative to niche appeal is a recurring discussion point for buyers who aren't committed to the 5.7x28mm caliber.