Aero Precision M4E1 Threaded 18\" .223 Wylde Complete Upper Receiver with 15\" ATLAS R-ONE Handguard - Anodized Black - APAR700705M42

Aero Precision APAR700705M42: 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. Includes: M4E1 Threaded Assembled Upper Receiver ATLAS R-ONE Handguard of choice 18\" .223 Wylde Rifle Length Stainless Steel Barrel Low Profile Gas Block and Rifle 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 18\" .223 Stainless Steel Rifle Length Barrel Features: .223 Wylde 18\" Rifle Length Barrel, 1/8 Twist 416R Stainless Steel Bead Blasted Finish .750 gas block journal Rifle length gas system M4 Feed Ramp Extension HP and MPI tested Standard A2 flash hider