The SUB-2000 is a pistol-caliber carbine manufactured by Kel-Tec CNC Industries of Cocoa, Florida, United States.

The 4130 ordnance steel barrel has a spring-loaded collar to ensure an accurate lock between the receiver and the polymer fore-end and the fully adjustable front sight.

The heavy two-piece steel bolt holds the firing pin, the extractor and has the operating handle on the bottom.

Folding is accomplished by pulling downward on the trigger guard and swinging the barrel assembly back over the top of the rifle.

A latch in the buttstock secures to the front sight housing, and the gun can be locked with a key in the folded position for added safety.