Rock River Arms Completed Upper Receiver A4 9MM Luger 10.5 Inch Barrel 1-10 Twist 1/2-36 Thread R4 Handguard A2 Flash Hider Black
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Rock River Arms
Overview
The Rock River Arms Completed Upper Receiver A4 is designed specifically for the AR-9 platform, featuring a 10.5-inch barrel optimized for 9mm caliber performance. With a 1:10 twist rate, this upper receiver is well-suited for stabilizing a variety of bullet weights, ensuring reliable accuracy. The included A2 flash hider helps mitigate muzzle flash, making it a practical choice for close-quarters shooting. This upper is commonly found in compact builds where maneuverability and quick handling are critical.
Specifications
Rock River Arms Completed Upper Receiver A4 9MM Luger 10.5 Inch Barrel 1-10 Twist 1/2-36 Thread R4 Handguard A2 Flash Hider Black
Available Merchants(1)
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Price and stock
Today the one retailer we track is out of stock. Listed prices start at $469.99 at Optics Planet for when it comes back.
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