Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 16 Inch Barrel Competition Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard
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Rock River Arms
Overview
The Rock River Arms Completed Upper Receiver National Match A4 is designed for precision and performance, featuring a 16-inch barrel with a 1:8 twist rate ideal for stabilizing a variety of bullet weights. This complete assembly ensures that builders can easily attach it to their AR-15 platform without needing additional parts. The A4 receiver type is commonly used in competition and target shooting builds, making this upper a solid choice for those looking to enhance accuracy and reliability.
Specifications
Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 16 Inch Barrel Competition Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard
Available Merchants(1)
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Build history on GunPartPicker
Builders on GunPartPicker first added the Rock River Arms Completed Upper Receiver National Match A4 .223/5.56mm 16 Inch Barrel Competition Profile 1-8 Twist 1/2-28 Thread Free-Float Handguard to a build in March 2026.
Today the one retailer we track has it in stock. Buying today, the lowest price is $679.99 at Optics Planet.
Updated · from real builds on GunPartPicker · Prices checked · refreshed daily across 37 retailers
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