Brownells Brn-Gau-5A Upper Receiver, 11.5'', 1-12 Twist, Black

Crafted for the discerning firearms enthusiast, the Brownells Brn-Gau-5A Upper Receiver transports you back to the golden age of military rifles while providing the modern performance you expect. With a perfect 11.5-inch barrel that allows for nimble maneuverability without sacrificing accuracy, this upper receiver is not only a nod to history but a vital component for your next retro build. Picture yourself at the range, the sleek lines of the receiver catching the light as you take aim, confident in the knowledge that you’re holding a piece steeped in military tradition yet thoroughly modern in its construction and design.

Every detail of the GAU-5A Upper Receiver has been meticulously designed, from the distinctive XM177-style flash hider that not only looks authentic but serves its purpose of mitigating flash signature to the classic handguards that echo the aesthetic of early carbines. Each shot feels deliberate as you experience the smooth operation of the slick side upper receiver, designed without a forward assist or shell deflector, evoking the feel of the original models. It’s more than just a firearm component; it’s an experience wrapped in nostalgia and functionality.

The receiver’s compatibility with a 1-12 twist barrel, paired with the manganese phosphate mil-spec bolt carrier group, ensures reliable performance when it matters most. The standard A1 rear sight offers ease of adjustment for precision shooting, while the A1-style ejection port cover adds to the authentic military flair. Whether you’re a collector of vintage-style components or an active shooter looking for reliable performance in a tactical situation, this upper receiver sits at the intersection of form and functionality, giving you the best of both worlds.

Elevate your shooting experience with the Brownells Brn-Gau-5A Upper Receiver. It’s not just about building a rifle; it’s about connecting with a legacy. Experience the joy of shooting as you relive history while embracing the reliability of contemporary manufacturing standards. Whether in the field or on the range, the GAU-5A will stand out as both an honor to its heritage and a testament to your passion for precision firearms.

Key Features

• M16 slick side upper receiver without shell deflector or forward assist
• XM177 flash hider with proper grenade ring
• 11.5 inch or 12.7 inch 5.56x45mm NATO barrel
• 12.7 inch configuration features a pinned and welded muzzle device, making it 16 inches plus
• 1-12 twist & chrome bore & chamber
• M16A1 ejection port cover
• A1 rear sight assembly
• Carbine black polymer handguards with heatshields
• Manganese phosphate mil-spec bolt carrier group with 9310 bolt

Technical Specifications

What's in the Box

• Brn-Gau-5A Upper Receiver
• Bolt Carrier Group
• Ejection Port Cover

Compatibility & Requirements

• Compatible with standard AR-15 lower receivers

Dimensions & Weight