Colt Complete Upper, 5.56 NATO, 16-inch, M4 Handguards, MATECH BUIS

The Colt Complete Upper (brand part no. LE6920CK) brings Colt’s reputation for reliability to an AR-15 build with a 16-inch, 5.56mm NATO complete upper receiver finished in black. It’s built with Colt’s M4-pattern handguards for a familiar profile and mounting layout, and it ships with a Colt MATECH rear back-up iron sight, giving a shooter a reliable folding aiming reference even without an optic mounted. As a complete upper, it’s built to drop onto a compatible AR-15 lower and be ready to run, carrying Colt’s own manufacturing standards into a build rather than relying on an aftermarket clone. It’s a solid choice for AR-15 owners who want genuine Colt components and the brand’s long service record behind their build.

Key Specifications

• Chambered in 5.56mm NATO/.223 Remington.
• Barrel measures 16 inches.
• Sold as a complete upper assembly.
• Finished in black.
• Fitted with Colt M4-pattern handguards.
• Includes a Colt MATECH rear back-up iron sight.

Frequently Asked Questions

Does this upper include front sights? It ships with a Colt MATECH rear back-up iron sight; front sight configuration follows the M4-pattern handguard setup.

Is this a complete, ready-to-run upper? Yes, it’s sold as a complete upper assembly built to drop onto a compatible AR-15 lower.

Buy the Colt Complete Upper, 5.56 NATO, 16-inch, M4 Handguards, MATECH BUIS

Bring genuine Colt reliability to your next AR-15 build. Order it through our Colt lineup of AR15 accessories and parts, and we’ll get it ready to ship as soon as it’s available from our Lubbock, Texas gun shop.