Daniel Defense M4A1 Complete Upper 5.56 14.5″ Pinned

The Daniel Defense M4A1 Upper Receiver Group is a factory complete AR-15 upper built around a 14.5" cold hammer forged M4-profile barrel with a permanently attached flash suppressor pinned and welded to meet regulated overall length requirements. It ships as a complete upper receiver group with an M16-profile bolt carrier group and an ambidextrous GRIP-N-RIP charging handle for both right- and left-handed operation. The design reflects Daniel Defense's M4A1 URG engineering and is intended for use on AR-platform rifles for duty, training, and precision practice.

Key Specifications

• Manufacturer is Daniel Defense.
• Model is listed as M4A1 URG.
• Caliber is .223 REM / 5.56 NATO.
• The barrel measures 14.5 inches and is a Cold Hammer Forged M4 profile.
• The barrel twist is 1:7.
• Barrel material and construction are Chrome Moly Vanadium steel, cold hammer forged.
• Barrel finish and treatment include chrome lined with Mil-Spec heavy phosphate coating.
• The gas system is a carbine-length direct impingement with a pinned low-profile gas block.
• The muzzle device is a Daniel Defense extended flash suppressor, pinned and welded.
• The upper ships with an M16-profile bolt carrier group and a GRIP-N-RIP charging handle.
• The listed weight is 5.35 lbs.

This complete upper brings factory-level components and construction to an AR-platform rifle, with a focus on durability and consistent performance. Its cold hammer forged barrel, properly finished bolt carrier group, and permanently attached muzzle device make it suitable for regular range use, training scenarios, and applications where a factory-built complete upper is preferred. Built from MIL-SPEC materials and processes, the M4A1 URG is intended to integrate with standard AR receivers and deliver dependable operation under routine use.