Daniel Defense M4A1 FSP 14.5″ 5.56 FDE Upper

Description

The Daniel Defense M4A1 FSP Upper Receiver Group provides a complete AR-15 style upper built to the design intent of a SOPMOD Block II-inspired platform. This upper pairs a 14.5″ M4 profile barrel (pinned to a 16″ overall length) with the M4A1 FSP RIS II picatinny quad rail in Flat Dark Earth for a rugged, modular mounting platform. Factory features include a Mil-Spec F-marked front sight base, A1.5 fixed rear sight, a Surefire SF3P flash hider/suppressor adapter, and an M16 profile full auto bolt carrier group as specified by the manufacturer.

Key Specifications

• The barrel length is 14.5″ Pinned (16″ OAL).
• The caliber is .223 REM/5.56 NATO.
• The barrel twist is 1:7.
• The rail system is the M4A1 FSP RIS II picatinny quad rail.
• Includes a Surefire SF3P flash hider / suppressor adapter.
• Features a Mil-Spec F-Marked front sight base and A1.5 fixed rear sight.
• Includes a M16 profile full auto bolt carrier group.
• The finish is Anodized in Flat Dark Earth.
• The model designation is M4A1.
• The product type is listed as Upper.

Engineered for builders and informed shooters who want a complete, ready-to-install upper, this Daniel Defense M4A1 FSP upper delivers proven components and straightforward, durable construction. Its combination of the FSP rail system, Surefire adapter, and M4A1-spec hardware makes it a practical choice for precision-oriented AR-15 style builds where modularity and reliability are priorities.

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