The Great Lakes Firearms 223 Wylde Complete Upper Receiver Black Nitride brings the heart of GLFA’s best-selling rifle to your existing AR-15 lower. Built around a 16" .223 Wylde barrel with a black nitride treatment, this complete upper is designed to deliver reliable accuracy while accepting both .223 Remington and 5.56 NATO ammunition. The long, slim M-Lok handguard and full-length Picatinny rail provide ample space for optics and accessories while keeping the profile sleek and manageable.

This upper receiver is well suited for range use, training, and general-purpose AR builds where consistency and ease of handling matter. The 1:8 twist barrel, carbine gas system, and threaded 1/2x28 muzzle give shooters a flexible platform for a variety of loads and compatible muzzle devices. Whether you are refreshing an older rifle or finishing a new build, this upper reflects Great Lakes Firearms’ focus on practical design and dependable performance.

• Manufacturer: Great Lakes Firearms
• Model: 223 Wylde Complete Upper Receiver Black Nitride
• Caliber: .223 Wylde
• Barrel Length: 16"
• Twist Rate: 1:8
• Muzzle: 1/2x28 threaded
• Handguard: 15.25" aluminum M-Lok