Daniel Defense M4A1 Flat Dark Earth / Black 5.56 / .223 Rem 16-inch

Daniel Defense M4A1 Upper

Mil-Spec upper receiver with indexing marks and M4 feed ramps. CNC machined of 7075-T6 aluminum and Type III hard coat anodized. Pinned low profile gas block is CNC machined of 4140 hardened steel, Mil–Spec heavy phosphate coating, carbine length, direct

The Daniel Defense M4A1 Upper Receiver Group features the M4A1 Rail Interface System (RIS II), which has been in use by US Special Operations Command (SOCOM) for the SOPMOD II Weapons System since 2005.  This two-piece, free-floating rail system allows the mounting of devices like a M203 grenade launcher without influencing the barrels harmonics, eliminating problems like wandering point of impact that plagued other mounting designs.  The two-piece design also allows for partial disassembly of the rail to aid in cleaning around barrel without completely removing the entire rail system.  The weight of anything attached to the RISII rail system is fully supported by a sturdy bolt-up system, using 6 grade 8 bolts, leaving the barrel completely free floating for best possible accuracy and dependability.  The M4A1 features a 14.5” Cold Hammer Forged M4 Profile barrel with a permanently attached Daniel Defense Improved Flash Suppressor to meet the NFA required 16” length. Daniel Defense complete upper receiver groups come complete with bolt carrier group and charging handle.

Daniel Defense M4A1 Upper Specifications: 

• UPC Code: 815604016612
• Manufacturer: Daniel Defense
• Manufacturer Part #: 23-004-13150
• Model: M4A1
• Type: Upper
• Caliber: 223 Rem
• Caliber: 556NATO
• Barrel Length: 16″ (14.5″ with Pinned Brake)
• Finish/Color: Flat Dark Earth
• Accessories: M4 12.0 Rail
• Type of Barrel: 1:7
• Subcategory: Upper Receivers
• Mil-Spec Upper Receeiver with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
• Chrome Moly Vanadium Steel Barrel, Cold Hammer Forged, 1:7 Twist, 14.5″ M4 Profile, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
• Pinned Low Profile Gas Block CNC Machined of 4140 hardened steel and Mil-Spec Heavy Phosphate Coating, Carbine length, Direct Impingement
• Daniel Defense Extended Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished, pinned and welded to Barrel