Rock River Arms Upper Receiver EOP .223 Wylde 20 Inch Barrel Varmint Profile 1-8 Twist Free-Float Handguard Black

Rock River Arms

Overview

The Rock River Arms Upper Receiver features a complete assembly with a 20-inch barrel chambered in .223 Wylde, allowing compatibility with both .223 Remington and 5.56 NATO cartridges. The 1:8 twist rate enhances accuracy, making it suitable for stabilizing a range of bullet weights, which is particularly beneficial for varmint hunting or precision shooting. This upper receiver is commonly found in builds focused on long-range accuracy and versatility.