Colt M4 Upper Receiver, Black

Colt M4 Upper Receiver

The Colt M4 upper receiver represents the gold standard in AR-platform construction. Built on decades of military and law enforcement service, this upper delivers the durability and reliability that serious shooters demand.

Key Features

• Caliber Compatibility: Chambers 223 Remington and 5.56 NATO ammunition
• Finish: Durable black oxide coating resists corrosion
• Dust Cover: Protects the charging handle and bolt carrier group from environmental contamination
• Forward Assist: Ensures positive bolt closure under all conditions
• M4 Feed Ramps: Precision-machined for reliable feeding with quality ammunition

Build Quality

Colt's manufacturing expertise shines through in every detail. The upper receiver is machined from high-quality materials and finished to exacting standards. Whether you're building a new rifle or upgrading an existing platform, this upper provides the foundation for years of dependable service.

The M4 feed ramps and forward assist work together to ensure consistent operation, making this upper suitable for everything from target shooting to tactical applications. Colt's commitment to excellence means you're investing in a component that will serve you reliably for decades to come.