What's in the Box Kel-Tec Sub2000 Gen 3 5.7x28mm Semi-Automatic Rifle with Folding (1) 20-Round Magazine Owner's Manual The KelTec SUB2000 chambered in 5.7x28mm offers a flat trajectory and low recoil, making it an ideal choice for accurate and controlled shooting. Its simple and reliable blowback design ensures ease of maintenance and consistent performance. The firearm features a 20-round magazine, a foldable design for compact storage, and a lightweight polymer frame. Integrated M-LOK and Picatinny rails provide full customization options to suit your needs. Firearm Specifications Brand: Kel-Tec Model: SUB2000 Caliber: 5.7x28mm Action: Semi-Auto Barrel Length: 16.1" Barrel Material: Steel Thread Pattern: 1/2"x28 Capacity: 20 Twist Rate: 1:7" Buttstock: Collapsible OAL: 30.45"