Aero Precision M4E1 223 Wylde Complete Upper Receiver - 16" Mid-Length Threaded Barrel - 15" ATLAS R-One Handguard - Black

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Aero Precision APAR700705M9: This complete upper includes Aero Precision's new ATLAS R-ONE Handguard! The R-ONE handguards are designed with size and weight in mind, while still providing plenty of real-estate to accommodate any attachment needs the end user may have. Aero Precision's proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards. This complete upper does not include BCG or Charging Handle.


  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS R-ONE Handguard of choice
  • 16" .223 Wylde Mid-Length Stainless Steel Barrel
  • Low Profile Gas Block and Mid-Length Gas Tube
  • Product comes assembled
  • M4E1 Threaded Upper Receiver Features:
  • New enhanced forging that gives the upper receiver a "billet look"
  • New picatinny profile that blends seamlessly with our Enhanced Series Handguards
  • M4 Feedramps
  • .250 takedown pin holes
  • Laser engraved T-marks
  • Includes port door and forward assist installed

ATLAS R-ONE Handguard Features:

  • Full top picatinny rail for optional attachments
  • Quick disconnect sling socket at the 3, 6 and 9 o'clock positions
  • Compatible with low profile gas blocks
  • 1.3" Inside diameter
  • 1.5" Outside diameter
  • Compatible with mil-spec AR15 upper receivers and barrels

16" .223 Stainless Steel Mid-Length Barrel Features:

  • .223 Wylde 16" Mid-Length Barrel, 1/8 Twist
  • 416R Stainless Steel
  • Bead Blasted Finish
  • .750 gas block journal
  • Mid-length gas system
  • M4 Feed Ramp Extension
  • HP and MPI tested
  • Standard A2 flash hider


  • Country of Manufacture United States
  • License Requirement None
  • Manufacturer Aero Precision
  • Mfg. Part Number APAR700705M9
  • UPC 840014602186
  • Caliber/Gauge .223 Wylde
  • Barrel Length 16"
  • Barrel Twist 1:8
  • Barrel Finish Bead Blasted
  • Firearm Fit AR-15
  • Threaded Barrel Yes
  • Condition New
barrel length:
threaded barrel
made in usa
caliber or gauge:
223 wylde
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