Aero Precision M4E1 Threaded 11.5″ 5.56 Carbine Barreled AR-15 Upper – 9″ M-LOK ATLAS R-ONE


  • M4E1 Threaded Assembled Upper Receiver
  • ATLAS R-ONE Handguard of choice
  • 11.5″ 5.56 CMV Barrel, Carbine Length
  • Low Profile Gas Block and Carbine Length Gas Tube
  • Product comes assembled


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SKUAPAR700702M29 Category

Note:The muzzle device is not pinned or welded, so this upper is only suitable for a pistol lower unless used for a legal SBR. Know your local laws and regulations.

Aero Precision has done it again with their new M4E1-T ATLAS R-One Complete Upper Receivers. These lightweight yet rugged uppers are designed for ultimate durability, thanks to Aero Precision’s ATLAS attachment system. This system is slim in the hand but maintains all the durability that Aero Precision is known for. The M4E1-T ATLAS R-One Complete Upper Receiver comes assembled on an M4E1 threaded upper receiver with an 11.5” CMV 5.56 Barrel and includes a 9-inch ATLAS R-One M-LOK handguard. The new ATLAS R-One handguards are as functional as they are aesthetic. These AR-15 handguards utilize 2 mirrored, tapered locking nuts that provide an evenly distributed clamping pressure across a custom barrel nut using a turnbuckle screw. QD sling cups are built into the side, providing an excellent base for a duty setup. Don’t miss your chance to get your hands on one of these great uppers from Aero Precision!


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