Rock River Arms Completed Pistol Upper Receiver A4 .223/5.56mm 20 Inch Barrel Standart Profile 1-9 Twist 1/2-28 Thread A2 Handguard A2 Flash Hider

Rock River Arms

Resumen

The Rock River Arms Completed Pistol Upper Receiver is designed for the AR-15 platform and features a 20-inch barrel with a 1:9 twist rate, making it suitable for stabilizing a variety of bullet weights commonly used in .223 and 5.56 NATO cartridges. This complete assembly includes an A4 receiver type, ensuring compatibility with standard AR-15 lower receivers. This upper is often utilized in precision-oriented builds that aim for accuracy and versatility in various shooting applications.