The KelTec R50 is a semi-automatic rifle chambered in 5.7x28mm with a 50+1 round capacity. Weighing 3.48 lbs., it has a 16.10-inch barrel and an adjustable overall length between 21.50 and 30.50 inches thanks to its folding stock. The receiver is black polymer with ambidextrous controls and adjustable iron sights. The barrel is threaded for suppressors or muzzle devices. 
 

Key Specifications 

• Brand: KelTec 
• Model Name: R50 
• Caliber: 5.7x28mm 
• Action: Semi-Auto 
• Capacity: 50+1 rounds 
• Barrel Length: 16.10 inches 
• Overall Length (OAL): Adjustable between 21.50 - 30.50 inches 
• Weight: 3.48 lbs 
• Sights: Adjustable Iron 
• Grip Material: Black Polymer 
• Safety Features: Ambidextrous safety 
• Finish Color: Black 
   

Detailed Features 

The folding stock reduces the overall length substantially for storage or transport. The threaded muzzle accepts suppressors and common muzzle devices. Ambidextrous controls mean left-handed shooters get full access without compromises. Adjustable iron sights come standard, and the platform accepts optics. The 5.7x28mm cartridge produces light recoil, which helps during 50-round strings.

Discussions around the KelTec R50 cluster around a handful of consistent points.

The design draws genuine interest. The idea of a 50+1 capacity semi-auto in a package weighing under 3.5 lbs. is unusual, and many owners appreciate the practical engineering behind the folding stock and ambidextrous layout.

Ergonomics get mostly positive marks. The grip feels comfortable and the controls are accessible, though the unconventional layout does take some handling time to feel natural coming from a traditional rifle.

Performance on the range is generally described as smooth. Recoil is light and cycling is consistent, which makes the 50-round magazine practical rather than just a headline spec.

Ammo cost is the recurring objection. The 5.7x28mm cartridge costs more than 9mm or .22 LR and availability can be inconsistent depending on the region, which factors into long-term ownership costs.

Customization options are discussed but the aftermarket is still developing for the platform. Some owners have added optics and found the setup straightforward; grip and stock options are more limited.

Value opinions vary. Those who want the specific combination of light weight, high capacity, and the 5.7 cartridge tend to see the price as reasonable. Others compare it to more established platforms and question the premium.