The Kel-Tec SU-16 is a semi-automatic rifle chambered in 5.56mm NATO / .223 Remington. At 4.70 lbs it's one of the lighter rifles in its class, largely due to Zytel polymer construction on the receiver and stock. 
 

Key Specifications 

• Manufacturer: Kel-Tec 
• Model: SU-16 
• Type: Semi-Automatic Rifle - Tactical 
• Caliber: 5.56mm NATO / .223 Remington 
• Barrel Length: 16 inches 
• Capacity: 10+1 rounds 
• Weight: 4.70 lbs (75.2 oz) 
• Overall Length: 35.9 inches 
• Finish Color: Black 
• Safety Feature: Crossbolt safety 
• Trigger Type: Single-stage trigger 
• Stock Type: Fixed with storage compartment 
   

Detailed Features 

The 16-inch barrel balances maneuverability and accuracy for range and field use. Adjustable iron sights are included. The Zytel polymer receiver and stock keep weight down without sacrificing structural integrity. The crossbolt safety is straightforward to operate. The fixed stock has a built-in storage compartment for small items like a cleaning kit or spare parts. 
 

Usage Scenarios 

The light weight makes the SU-16 practical for extended range sessions or hunts where carrying a heavier rifle would be a disadvantage. The 5.56mm caliber handles varmint and small game work well. It's also manageable in home defense situations where weight and overall length matter.

The Kel-Tec SU-16 Tactical gets mixed reviews, with the positives centered on weight and price and the criticisms focused on build quality and ergonomics.

The weight is the most appreciated feature. At 4.70 lbs, shooters who prioritize mobility find it more practical than heavier alternatives. Price is another regular selling point -- many buyers feel it offers good value compared to other 5.56 options. The folding stock's storage compartment and compact form are liked by those who want an easy-to-stow rifle.

On the critical side, build quality is the most common concern. Some parts feel less solid compared to traditional aluminum or steel rifles, and a few users report durability issues. Ergonomics also get mixed marks -- stock comfort and control placement don't work as well for some shooters. Accuracy at longer ranges is flagged by a handful of users as a weak spot relative to other rifles in the class. The look of the SU-16 is divisive; some like it, others find the polymer aesthetic unappealing.