The Desert Tech Micron was designed to be a highly compact, highly versatile personal defense weapon. With an overall length of just 23.43, the Micron can easily be concealed under a jacket or inside a backpack, and provides superior ballistics when compared to other .223 Wylde rifles of a similar length. This kit contains everything needed to convert a standard .223 Wylde MDRx rifle with a side ejection port into a MDRx Micron. Kit Includes:11.5 inch .223 Wylde Side Eject Barrel Assembly Micron Fore GripInstruction ManualATF Registration KitNote: Installing this kit converts your MDR/MDRx rifle into a short barreled rifle. All NFA regulations apply Desert Tech MDRx Micron .223 Wylde 11.5" SE BLK Barrel & Grip Kit MDR-CK-B11-SE-B