The Kel-Tec RDB Defender Rifle is a compact semi-auto carbine chambered in .223 Rem/5.56 Nato with a 16.1-inch barrel. It includes a 20-round Magpul PMAG and features an ambidextrous safety. This bullpup design measures 37.1 inches in overall length, making it lightweight and tactical.Key FeaturesBarrel Length: Features a 16.1-inch pencil profile barrel.Included Magazines: Ships with one 20-round Magpul PMAG.Rate of Twist: 1:7 inch twist rate for compatibility with a variety of ammunition.