The Colt M4 LE6943 Upper Group 11.5in With BCG And Sights is a complete monolithic AR-15 upper designed for shooters who want factory-engineered reliability in a compact package. Built around Colt’s rigid one-piece upper receiver with full-length Picatinny rail, this assembly includes an 11.5 inch chrome-lined, button-rifled barrel chambered in 5.56x45 NATO, a bolt carrier group, and integrated backup sights for a ready-to-mount solution.

This upper is well suited for range use, training, and duty-style configurations where a shorter barrel and free-floated design are preferred. The carbine-length gas system and 1-7 twist rate support a wide range of 5.56 NATO loads, while the threaded muzzle allows the use of compatible flash hiders or other devices in accordance with local laws. Colt’s long-standing reputation for dependable AR-15 platforms and careful machining is reflected in the fit, finish, and performance-focused design of this upper group.

Key Features:

• Manufacturer: Colt
• Model: M4 LE6943 Upper Group 11.5in With BCG And Sights
• Caliber: 5.56x45 NATO
• Barrel Length: 11.5 inches
• Twist: 1-7
• Gas System Length: Carbine
• Receiver Style: Complete monolithic upper
• Color: Black
• Threaded Barrel: Yes