Daniel Defense M4A1 URG | 5.56 | 14.5″ | MFG# 23-004-13150

The Daniel Defense M4A1 Upper Receiver Group (URG) is a complete AR-style upper built around the SOCOM-proven RIS II rail system and a 14.5″ cold hammer forged M4 profile barrel with a permanently attached flash suppressor to achieve a 16″ overall length. The upper ships with an M16-profile bolt carrier group and the GRIP-N-RIP ambidextrous charging handle for reliable operation in training and professional applications. Construction uses mil-spec materials including 7075-T6 and 6061-T6 aluminum components and chrome-moly-vanadium steel for the barrel.

Product Specifications

• The manufacturer is Daniel Defense.
• The model is listed as M4A1 URG.
• The manufacturer’s part number is 23-004-13150.
• The caliber is .223 REM / 5.56 NATO.
• The barrel is a 14.5″ cold hammer forged M4 profile with chrome lining and heavy phosphate coating.
• The rate of twist is 1:7.
• 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, 17-4 PH stainless, salt bath nitride finished, pinned and welded to the barrel.
• The bolt carrier group is a M16-profile, chrome-lined, MP-tested unit with a properly staked gas key.
• The handguard is a Daniel Defense RIS II 12.0″ rail CNC-machined from 6061-T6 aluminum and Type III hard coat anodized.
• The charging handle is the GRIP-N-RIP ambidextrous charging handle with 7075-T6 body and 6061-T6 handles.
• The rail panels included are Daniel Defense Santoprene rail panels, heat resistant to 300°F.
• The listed weight is 5.35 lb.
• The product UPC is 815604016612.

Built to mil-spec standards and using materials and processes specified for professional use, this upper is suited for precision range work, training, and competitive/practical shooting where a robust free-floating rail and a proven barrel profile are priorities. The RIS II rail provides a familiar footprint for mounting sights and accessories while leaving the barrel free-floating to preserve harmonics.

Overall, the M4A1 URG delivers a mission-oriented parts set and a rugged build that appeals to users seeking a proven platform for range and competition use. Its mix of cold hammer forged barrel, pinned/welded flash suppressor, and the SOCOM-used RIS II architecture makes it a practical choice for those who prioritize reliability and consistent performance.