The Stag Arms Stag 15 .300 Blackout 16 In Upper is a complete AR-15 upper receiver assembly built around a 16-inch barrel chambered in .300 AAC Blackout. Its medium contour barrel, classic birdcage flash hider, and slim free-float handguard with M-LOK slots work together to deliver dependable accuracy and smooth handling on a wide range of AR-15 builds.

This upper is ready to pin onto your compatible lower, giving you a dedicated .300 Blackout setup for range work, training, or hunting where the cartridge’s performance shines. The 1:7 twist rate stabilizes both subsonic and supersonic loads, while the anodized finish and lightweight Slimline handguard help keep the rifle durable and easy to maneuver. It is a practical choice for shooters who want a versatile .300 Blackout upper backed by Stag Arms’ experience in AR-15 manufacturing.

• Manufacturer: Stag Arms
• Model: Stag 15 .300 Blackout 16 In Upper
• Caliber: .300 AAC Blackout
• Barrel Length: 16 in
• Twist Rate: 1-7
• Muzzle: 5/8-24 with birdcage flash hider
• Style: Complete upper receiver