The Kel-Tec P50 is a semi-automatic pistol chambered in 5.7x28mm with a 50+1 round capacity. That capacity is the defining spec — it uses FN P90-style magazines mounted horizontally above the barrel, which produces the pistol's distinctive flat profile. The 9.6-inch barrel and 15-inch overall length push it toward the large end of what gets classified as a pistol, and two magazines are included. 
 

Key Specifications 

• Brand: Kel-Tec 
• Model: P50 
• Caliber: 5.7x28mm 
• Action: Semi-Auto 
• Capacity: 50+1 RD 
• Barrel Length: 9.6 inches 
• Overall Length: 15 inches 
• Weight: 3.2 lbs 
• Sights: Optic Ready 
• Grip Material: Tan Polymer (Synthetic) 
• Includes: Two magazines (FN P90 type) 
   

Detailed Features 

 
The P90-magazine feed system is what makes this gun work. The magazines lay flat on top of the action and feed downward, allowing 50 rounds in a relatively compact form factor. The optic-ready top rail gives you a mounting surface for red dots or low-power optics. The 5.7x28mm round has low recoil relative to its velocity, which makes 50-round sessions at the range comfortable. 
 
At 3.2 lbs and 15 inches overall, this is not a traditional carry pistol — it is closer to a large-format pistol or compact PDW analog. The tan polymer frame keeps weight down. The 9.6-inch barrel extracts good ballistic performance from the 5.7mm cartridge.

The Kel-Tec P50 generates genuine enthusiasm alongside honest skepticism, and both camps make valid points.

The high-capacity P90 magazine system draws the most attention. Fifty rounds of 5.7x28mm in a pistol-format package is unusual, and shooters who want high capacity without going to a PCC generally find the concept compelling. The 5.7mm round's low recoil is consistently praised — it makes running through a full magazine fast and comfortable. The optic-ready rail is well-positioned and accepts most common red dots without issues.

The polymer construction keeps weight manageable at 3.2 lbs, though the 15-inch overall length makes this impractical for standard concealed carry or holster use.

The most common concerns involve reliability. Feeding issues and concerns about long-term durability come up in enough reviews to be worth noting — Kel-Tec's quality control history is a factor some buyers weigh against the innovative design. The unconventional layout also has a learning curve; shooters used to traditional pistol handling need time to adjust. Overall, the P50 is a genuinely interesting gun, but buyers looking for a proven, conventional design will want to consider the reliability track record before committing.