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Daniel Defense AR-15 M4A1 Upper Receiver Assembly 5.56x45mm 14.5″ Pinned Barrel

$1,350.00

Product Overview – Daniel Defense AR-15 M4A1 Upper Receiver Assembly 5.56x45mm 14.5″ Pinned Barrel

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.

Features

  • 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
  • M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
  • Daniel Defense M4A1 Rail Interface System (RIS) II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized FDE
  • Daniel Defense Rail Panels Made from Santoprene, Heat Resistant to 300° F.

 

Made In United States of America

Specifications

Product Information

Cartridge 5.56x45mm NATO
Finish Hardcoat Anodized
Material Aluminum
Weight 4.56 Pound
Barrel Length 14.5 Inches
Twist 1:7 Inches
Barrel Contour M4
Sights No
Barrel Finish Anodized Black
Chrome Lined Yes
Gas System Length Carbine
M4 Feed Ramps Yes
Upper Receiver Type A4 Flat-Top
Barrel Material Chrome Moly Steel
Handguard Daniel Defense M4A1 Rail Interface System (RIS) II
Bolt Carrier Assembly Included Yes
Muzzle Device Daniel Defense Extended Flash Suppressor
Mil-Spec or Commercial Mil-Spec
Country of Origin United States of America
Compatible With
AR-15

Delivery Information

Shipping Weight 5.700 Pounds

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