Daniel Defense M4A1 complete upper assembly
with 14.5” factory pinned flash hider
from Daniel Defense:
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 extended A2 Flash Suppressor to meet the NFA required 16” length. Daniel Defense complete upper receiver groups come complete with bolt carrier group and charging handle.
MATERIALS & CONSTRUCTION
• 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" M4 Profile, Chrome Lined, and Mil-Spec Heavy Phosphate Coated
• 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: Extended Flash Suppressor, 17-4 PH Stainless Steel, Salt Bath Nitride or Parkerized Finished, pinned and welded to Barrel
• BOLT CARRIER GROUP: M16 Profile, Chrome Lined, Properly Staked Gas Key • SIGHTS: Sold Separately
• HANDGUARD: Daniel Defense M4A1 Rail Interface System (RIS) II, CNC Machined of 6061-T6 Aluminum, Type III Hard Coat Anodized FDE • RAIL PANELS: Daniel Defense Rail Panels made from Santoprene, heat resistant to 300° F.
• Made in the USA!
Note: All ITAR regulations apply. Charlie's deals in the real McCoy. Your item most likely has parts that cannot be shipped outside of the USA, or owned in the USA by non-US Persons. You take accountability to safeguard parts and the entire upper, and get necessary approvals to transport outside of the USA.
Please feel free to ask questions before you buy.