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
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Rock River Arms
Overview
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.
Specifications
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
Price and stock
The 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 was out of stock everywhere we track for all of September 2026, and today none of the 2 retailers we track has it in stock right now. Listed prices start at $480.99 at KY Gun Company for when it comes back.
Prices checked · refreshed daily across 37 retailers
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