Aero Precision M4E1 Threaded Barreled AR-15 Upper .223 Wylde Fluted Rifle Atlas R-One – 18″


  • 18” .223 Wylde
  • 416R stainless steel
  • Fluted
  • HPT and MPI
  • Bead blasted finish
  • 1:8 twist rate
  • Rifle length gas system
  • M4E1 Threaded forged 7075-T6 upper
  • Hardcoat anodized
  • Laser engraved T-marks
  • Scalloped picatinny top rail
  • Built in anti-rotation tabs
  • M-LOK slots
  • Does not include BCG or charging handle


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SKUAPAR700705M51 Category

his barreled upper receiver is built around the M4E1 Threaded upper receiver, which is designed for use with standard barrel nut setups. The receiver is forged from 7075-T6 aluminum and precision machined to M4E1 specs, ensuring a proper fit with Mil-Spec and aftermarket parts. It’s finished with a matte black hardcoat anodize and laser engraved T-marks.

The .223 Wylde 18” barrel is machined from 416R stainless steel with a bead blasted finish. It features a rifle length gas system and a 1:8 twist rate. The barrel also has an M4 feed ramp barrel extension and is magnetic particle inspected as well as high pressure tested. A standard A2 flash hider is included.

The Atlas R-One M-LOK free float handguard boasts a full length picatinny top rail and an extremely slim 1.3” inner diameter. This makes it the perfect platform for mounting your favorite optics and accessories.


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