The One Horse OH-CU03 5.56 NATO Complete Upper features a compact 7.5-inch length, making it suitable for various applications. This complete upper is designed to fit standard AR15 lower receivers, providing a reliable and efficient upgrade. The upper is finished in black and has a 1-7 rate of twist.Key FeaturesLength: Measures 7.5 inches for a compact profile.Rate Of Twist: Equipped with a 1-7 twist rate for optimal stabilization of various bullet weights.Style: Complete upper assembly, ready to install on compatible AR15 lowers.