Aero Precision M4E1-T 5.56 NATO Barreled Upper Receiver - 13.9" - Black Anodized

The Aero Precision M4E1-T Barreled Upper Receiver is a pre-assembled upper designed for AR-15 platform builds chambered in 5.56 NATO. It features a lightweight and versatile 13.9-inch mid-length barrel for a balance between maneuverability and accuracy. The upper comes with the ATLAS R-ONE handguard, known for its slim profile and ample space for mounting accessories like bipods, lights, or lasers. The ATLAS attachment system offers a secure and dependable platform for these attachments.

The upper receiver itself is M4E1 threaded, featuring an enhanced forging for a distinctive look and a new picatinny rail profile for a seamless transition to the handguard. It includes standard features like M4 feed ramps, laser engraved T-marks, and a dust cover and forward assist pre-installed.

Note: This barreled upper receiver does not include a bolt carrier group (BCG) or charging handle. These can be purchased separately.

Features:

• Caliber: 5.56 NATO
• Barrel Length: 13.9 inch mid-length
• Handguard: ATLAS R-ONE, 12.7 inch
• Material: Chrome Moly Vanadium (CMV) steel barrel
• Barrel Twist: 1/7 twist rate
• Gas System: Mid-length
• Upper Receiver: M4E1 Threaded with enhanced forging
• Handguard Attachment: ATLAS attachment system
• Picatinny Rail: Full top rail on handguard
• M4 Feed Ramps
• Laser Engraved T-Marks
• Includes: Port door and forward assist
• Does not include: Bolt Carrier Group (BCG) or Charging Handle

The 13.9-inch barrel is constructed from chrome moly vanadium steel with a 1/7 twist rate, known for its accuracy with a variety of bullet weights. A mid-length gas system ensures smooth operation. The barrel includes a standard A2 flash hider, and has been pressure and high-pressure tested for reliability.