Daniel Defense DD5 V4 Upper — 7.62×51 NATO 18in M-LOK

The Daniel Defense DD5 V4 Upper Receiver Group chambered in 7.62x51mm NATO (.308 Winchester) pairs an 18-inch cold hammer forged barrel with a DD5 M-LOK handguard for long-range-capable builds. The upper includes a user-adjustable gas block and a superfinished, DLC-coated bolt carrier group to support suppressed or unsuppressed operation. It is designed for the Daniel Defense semi-automatic platform and maintains backward compatibility with earlier DD5 versions where specified.

Key Specifications

• Chambered for 7.62x51mm NATO / .308 Winchester.
• The barrel measures 18 inches.
• The barrel is cold hammer forged proprietary steel, chrome-lined for durability.
• The barrel profile is S2W.
• The gas system is rifle-length direct impingement.
• The mounting system is M-LOK.
• The upper receiver is machined from 7075-T6 aluminum with Type III hard coat anodize.
• The handguard is a Daniel Defense DD5 Rail 15.0 made from 6061-T6 aluminum, M-LOK.
• The bolt carrier group is superfinished and DLC-coated.
• Includes a user-adjustable gas block for reliable suppressed or unsuppressed cycling.

Engineered for precision-focused builds, the DD5 V4 upper delivers a balance of durability, modularity, and suppression-ready operation for long-range applications. Its combination of a rigid rail system, cold hammer forged barrel, and adjustable gas control makes it a practical choice for shooters assembling a high-performance 7.62x51 platform.