The Stag Arms Stag 15L Left Hand M4 Phosphate Upper brings the classic M4 configuration to left-handed shooters who want a dependable, GI-style AR-15 upper. Built around a 16" M4-profile barrel with a durable phosphate treatment, this complete upper includes an A2 front sight base, fixed carry handle rear sight, and a thermoplastic handguard that delivers the familiar feel of a traditional service carbine.

This upper is chambered in 5.56 NATO with a 1:7 twist rate to stabilize a wide range of bullet weights, making it a solid choice for training, general range use, or duty-style builds. The left-hand configuration is designed for shooters who prefer brass ejection away from their face, while still remaining compatible with standard AR-15 lower receivers. Add your preferred mil-spec bolt carrier group and charging handle, and you have a straightforward, reliable upper backed by Stag Arms’ reputation for purpose-built AR platforms.

• Manufacturer: Stag Arms
• Model: STAG15111111 Stag 15L Left Hand M4 Phosphate Upper
• Caliber: 5.56 NATO
• Barrel Length: 16" M4 profile
• Twist Rate: 1:7
• Finish Color: Black phosphate
• Style: Complete upper receiver