The KelTec SUB2000 is a semi-automatic rifle in .40 S&W with a folding design that halves its length for storage or transport. At 4.3 lbs and 30.5" extended, it's one of the lighter carbines in this caliber. 
 

Key Specifications 

• Caliber: .40 S&W 
• Action: Semi-Automatic 
• Capacity: 15 Rounds 
• Barrel Length: 16.1 inches 
• Total Length: 30.5 inches (when extended) 
• Weight: Approximately 4.3 lbs (68 oz) 
• GSIN: KELTC-LEW7Y2ZM 
• Manufacturer Name: KelTec 
• MSRP: $574 
   

Detailed Features 

1. Folding Design: Folds in half for storage or discreet carry — the main reason most people choose the SUB2000 over a conventional carbine. 
    
2. Adjustable Stock: Three positions, which covers most shooter sizes without extra hardware. 
    
3. Construction: 4140 steel receiver with Zytel synthetic for the stock and grip. Salt bath nitride finish on the barrel and receiver for corrosion resistance. 
    
4. Sights: Adjustable front, fixed rear. Adequate for close to mid-range work; most owners eventually add optics. 
    
5. Safety: Crossbolt safety. 
    

Usage Scenarios 

1. Home Defense: Folds small for storage, unfolds quickly, and 15 rounds of .40 S&W is a credible load. 
2. Competitive Shooting: The adjustable stock and accurate enough sights let you get on target fast. Works well with existing Glock magazines if you run that platform. 
3. Range / Recreation: Light and easy to pack; not a hunting gun, but fine for plinking or practice.

The SUB2000 in .40 S&W draws consistent praise for what it is — a compact, foldable carbine at an accessible price — and consistent criticism for what it isn't: a refined, match-grade rifle.

The folding design is the gun's main selling point and owners generally love it. The ability to pair it with Glock magazines is another frequent plus, especially for shooters who already run that platform. The price also comes up often; it's one of the cheaper carbines in this class.

Reliability is where things split. Many owners report zero malfunctions; others have had feeding issues, sometimes traced to specific ammunition brands or loads. Testing several loads before settling on one is the usual advice.

Ergonomics get mixed marks. The lightweight build is welcome, but cheek weld and sight alignment take some adjustment, and a number of owners add aftermarket sights or a red dot fairly quickly. Aftermarket support is decent but narrower than what's available for more mainstream platforms.

Accuracy is adequate for close to mid-range shooting. It's not a precision rifle by any measure, and that's not what it's designed to be.