Daniel Defense M4A1 RIII Complete Upper Receiver - 14.5" FDE

The DD4 RIII Upper Receiver Group offers the longest barrel length of the RIII family and is perfect for popular shooting sports and for tactical defensive applications. Built around a 14.5 inch Cold Hammer Forged Government Profile barrel, its mid-length gas system is known to have a smoother recoil impulse.

A 12.5" lightweight RIS III rail—modeled after the revolutionary RIS II two-piece handguard developed for SOCOM—free-floats the barrel and features M-LOK attachment for lighter weight. It has our ambidextrous Grip-N-Rip Charging Handle and ships with an M16 Profile bolt carrier group.

Features:

• UPPER RECEIVER: Mil-Spec with Indexing Marks and M4 Feed Ramps. CNC Machined of 7075-T6 Aluminum, Type III Hard Coat Anodized
• BARREL: Chrome Moly Vanadium Steel, Cold Hammer Forged, 1:7 Twist, 14.5" Government Profile, Mid Length length Gas System, Chrome Lined, Mil-Spec Heavy Phosphate Coated, and HP/MPI Tested
• GAS SYSTEM: Pinned Low Profile Gas Block CNC Machined of 4140 Hardened Steel and Mil-Spec Heavy Phosphate Coating, Mid-length, Direct Impingement
• MUZZLE DEVICE: Daniel Defense Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride Finished
• BOLT CARRIER GROUP: M16 Profile, Mil-Spec MP Tested, Chrome Lined, Properly Staked Gas Key
• HANDGUARD: RIS III 12.5", Patented 6-Bolt Bolt-Up System, CNC Machined of 6061-T6 Aluminum, FDE Type III Hard Coat Anodized
• CHARGING HANDLE: GRIP-N-RIP Charging Handle, Body CNC Machined of 7075-T6 Aluminum, Handles & Latch CNC Machined of 6061-T6 Aluminum, Heavy Duty Stainless Steel Roll Pins, Type III Hard Coat Anodized

Specifications:

• Barrel Material: 4150 Chrome Moly Vanadium
• Barrel Type: Cold Hammer Forged
• Barrel Profile: Government
• Rifling Twist: 1:7"
• Gas System Length: Mid Length
• Muzzle Device: Flash Suppressor
• Weight: 4.175 LBS
• Rail System: RIS III 12.5" (M-LOK)