The Kel-Tec KSG Compact is a bullpup 12-gauge pump-action shotgun with dual magazine tubes that hold 8 rounds of 3" shells (plus one in the chamber). The 18.5" barrel in a 26.1" overall package is the same bullpup advantage as the standard KSG. It weighs 6.8 lbs. and has a black Zytel synthetic stock with Picatinny rails front and rear. 
 

Key Specifications 

• Brand: Kel-Tec 
• Model: KSG Compact 
• Caliber/Gauge: 12 Gauge 
• Capacity: 8+1 rounds (3" shells) 
• Barrel Length: 18.5 inches 
• Overall Length (OAL): 26.1 inches 
• Weight: 6.8 lbs 
• Action Type: Pump-Action 
• Chamber Size: 3 inches 
• Sights: Optic Ready (Picatinny Rails Front and Rear) 
• Stock Material: Synthetic (Zytel) 
• Finish Color: Black 
   

Features 

 
The KSG Compact uses the same dual-tube, bullpup layout as the standard KSG but is tuned for 3" shells, giving 8+1 total versus the standard model's 12+1 with 2.75" shells. The tube selector switch lets you manually choose which tube feeds, which allows loading different loads in each tube. 
 
No iron sights are included; the Picatinny rails front and rear accept a wide range of red dots, lights, or grip accessories. The pump action requires deliberate, full-stroke cycling to avoid short-stroking, a characteristic of the bullpup layout that benefits from practice. 
 
At 26.1" overall the KSG Compact is among the shorter 12-gauge platforms with an 18.5" barrel. That dimension is the primary reason to choose it over a conventional pump.

The KSG Compact generates the same discussion themes as the standard KSG, with the tube capacity difference (8+1 vs 12+1 for 2.75" loads) coming up as a distinction buyers are aware of. Most buyers choosing the Compact specifically want the 3" chamber for heavier hunting or defense loads.

The compact length and dual-tube design are the consistent positives. Ergonomics feedback is mixed in the same way as the standard KSG. The bullpup layout is intuitive for some shooters and takes adjustment for others, particularly around grip position and the ejection port orientation.

Reliability and ammunition sensitivity come up consistently. Running a selection of loads before depending on it for defense use is the standard recommendation from experienced KSG owners. Feeding is generally reliable with quality ammunition; some defensive or hunting loads may require testing for reliable function.

Customization through the Picatinny rails is often mentioned as a positive. Lights and red dots attach easily. Pricing is seen as reasonable for the platform. The KSG Compact works well for buyers who specifically need the short OAL with 3" chamber capability.