Daniel Defense M4A1 FSP Upper 14.5in 5.56 FDE

This Daniel Defense M4A1 FSP Upper Receiver Group is a complete AR-15 style upper built to USSOCOM SOPMOD Block II–inspired specifications. It is finished in Flat Dark Earth and features the M4A1 FSP RIS II picatinny quad rail. The assembly includes a 14.5" M4 profile barrel pinned to a 16" overall length and ships with a Surefire SF3P flash hider / suppressor adapter, fixed sights, and an M16 profile full auto bolt carrier group.

Key Specifications

• The model is M4A1.
• The finish is Anodized.
• The color is Flat Dark Earth.
• The caliber is .223 Rem / 5.56 NATO.
• The barrel twist rate is 1:7.
• The barrel length is 14.5" pinned (16" OAL).
• The handguard is a M4A1 FSP RIS II picatinny quad rail.
• Includes a Surefire SF3P flash hider / suppressor adapter.
• Includes an M16 profile full auto bolt carrier group.
• The listed weight is 6.1.

Engineered for builders and users seeking a rugged, SOPMOD-style upper, the Daniel Defense M4A1 FSP balances proven components and military-inspired features for duty, training, and precision carbine applications. Its integrated rail system, sight package, and adapter compatibility provide a versatile foundation for custom builds and professional use.