Brownells Brn-601 5.56Mm 20'' Bbl Upper Receiver

For the discerning firearms enthusiast, the Brownells BRN-601® Complete Upper Receiver is more than just a firearm component; it's a piece of history. Reviving the iconic design of the original Model 601 from the late 1950s, this upper receiver embodies the craftsmanship and precision that defined the early days of the AR-15 platform. Whether you’re stepping onto the range for a competitive match or enjoying a weekend of target practice, this upper receiver offers a nostalgic yet highly functional twist to your shooting experience.

The BRN-601® is a celebration of design elements that will make any vintage firearm collector or modern shooter swoon. A standout feature is the unique "duckbill" flash hider, securely held in place by an appropriate split washer. This meticulously designed flash hider not only minimizes flash signature but also sets the tone for the impressive silhouette of the 20-inch lightweight barrel. With a 1-12 twist rate, it excels in stabilizing 55gr and lighter projectiles, ensuring that each shot delivers remarkable velocity, accuracy, and performance that can elevate your shooting experience well beyond expectations.

The visual appeal of the BRN-601® doesn’t stop at functionality. The matte gray anodizing on both the upper receiver and the flat slip ring harmonizes beautifully, providing a rugged yet sleek aesthetic that pays homage to the original AR-15 styling. The solid green triangle handguards evoke a classic feel while accommodating modern needs. The slickside upper design ensures that every glance finds perfection; no unnecessary distractions, just pure performance and style for the modern marksman.

But it doesn’t stop there. Beneath the eye-catching exterior lies a commitment to modern operating standards. With a chrome bolt carrier group featuring 9310 steel, you can trust in enduring quality and reliability. The solid firing pin retaining pin and modern staked gas key screws enhance performance and safety—features that symbolize a bridge between past innovation and present-day engineering. Shooting enthusiasts who crave historical authenticity without compromising modern functionality will find their perfect match in the BRN-601®. Arm yourself with a piece of history and redefine your shooting prowess today!

Key Features

• Slickside upper receiver
• Matte gray anodizing (not painted)
• 20" 5.56x45mm NATO barrel with 1-12 twist & chrome bore
• Chrome, slickside M16 bolt carrier group with 9310 bolt
• Duckbill three prong flash hider

Technical Specifications

What's in the Box

• BRN-601® Complete Upper Receiver
• Owner's Manual

Compatibility & Requirements

• Requires a compatible lower receiver for assembly

Dimensions & Weight