The Stag Arms Stag 15 M4 Phosphate Upper is a classic AR-15 upper receiver assembly built around the proven M4 configuration. Featuring a fixed carry handle upper, traditional polymer handguards, and a durable phosphate finish, this upper is designed to deliver dependable performance and a familiar sight picture for shooters who prefer the original M4 style.

This upper receiver is ideal for building or refreshing a rifle for range use, training, or general-purpose shooting where reliability and simplicity are priorities. The integrated carry handle rear sight and front sight base provide a robust iron sight setup without the need for additional optics. Paired with Stag Arms’ reputation for solid construction and attention to detail, the Stag 15 M4 Phosphate Upper offers a straightforward, trustworthy foundation for your AR-15 build.

• Manufacturer: Stag Arms
• Model: Stag 15 M4 Phosphate Upper