The Kel-Tec R50 is a semi-automatic rifle chambered in 5.7x28mm with a 16.10-inch barrel and a folding stock. The folding stock brings overall length from 30.50 inches (unfolded) down to 21.50 inches, which is useful for storage and transport. The 50+1 capacity magazine is one of the defining features. It weighs 3.48 lbs. and the green polymer construction keeps it light. 
 

Key Specifications 

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

Detailed Features 

 
The 50+1 magazine holds more rounds than most comparable semi-auto rifles without getting into drum-magazine territory. Adjustable iron sights are included and let you fine-tune your point of impact. The threaded muzzle accepts suppressors or other muzzle devices. Ambidextrous safety and controls accommodate both dominant hands. The folding stock mechanism is straightforward and the rifle handles fire from the folded position in some configurations. 
 

Target Audience 

 
Sport shooters who want a high-capacity 5.7x28mm rifle, recreational shooters who appreciate the low recoil of the caliber, and buyers looking for a compact-folding semi-auto at a mid-range price point. 
 

Usage Scenarios 

 
Well-suited for range days where high round count and low recoil matter. The 5.7x28mm round is effective for small game and varmint control. The folded stock length makes it easy to transport in a bag or vehicle.

The Kel-Tec R50 generates genuine enthusiasm in the community, balanced by some practical caution.

The folding stock design draws consistent praise for portability — the ability to go from 30.50 inches to 21.50 inches quickly makes it genuinely practical for transport and storage. The 50-round magazine capacity is a distinct feature that attracts buyers who want extended shooting sessions without reloads. The 5.7x28mm caliber gets positive attention for its low recoil and flat trajectory, and the 3.48 lb. weight makes it comfortable to carry.

Reliability feedback is where the community splits. Many owners report clean function, but feeding problems and jams with specific ammo types come up often enough to be worth noting, particularly with early production guns. Ammunition cost and availability for 5.7x28mm is also a recurring discussion point.

Ergonomics get mixed reviews — some find the balance and handling fine, others note the weight distribution requires adjustment. Aftermarket support is more limited than for AR-platform rifles, though Kel-Tec's own accessory ecosystem helps.

Price compared to other 5.7x28mm options is a positive. Overall: an interesting, capable platform with genuine practical advantages, but worth researching reliability reports specific to your ammo choice before committing.