Aero Precision 5.56 M4E1 Enhanced Mid-Length Barreled Upper - Pinned Epsilon SL - 14.5"

Manufactured by Aero Precision
SKU: APAR640232M68
MPN: APAR640232M68
Manufactured by Aero Precision
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This Aero Precision AR-15 barreled upper receiver features a the M4E1 Enhanced upper receiver and 12” M-LOK Gen 2 handguard. The 14.5” barrel comes with the VG6 Epsilon SL556 muzzle brake pinned and welded bring the overall length up to 16” to prevent the need for getting a tax stamp or sending it to your gunsmith. The Medium profile barrel is machined from 4150 Chrome Moly Vanadium and salt bath Nitride finished. The mid-length gas system offers exceptional reliability lower felt recoil. This Aero Precision M4E1 Enhanced barreled upper receiver is compatible with Mil-Spec lowers.

  • 14.5” 5.56 NATO barrel
  • Pinned VG6 Epsilon SL muzzle brake
  • Mid-length gas system
  • Medium barrel profile with Nitride finish
  • M4E1 enhanced receiver and handguard
  • M-LOK and QD sling slots
  • Hardcoat anodized black

The M4E1 upper receiver is forged from 7075-T6 aluminum and hardcoat anodized and features laser engraved T-marks. The Gen 2 free float M-LOK handguard features built in anti-rotation tabs, scalloped continuous picatinny top rail and a large 1.78” internal diameter. It also features quick detach sling swivel slots and improved profile for a better gripping surface.

Aero Precision takes some of the most state-of-the-art manufacturing techniques and equipment derived from their work in the aerospace industry and applies it to their products in the firearms industry. They have utilized their knowledge from years of building aircraft components to design and engineer AR-15 handguards, receiver sets, scope mounts, and more. They treat every product as if it were a precision flying machine and adhere to strict quality standards to ensure law enforcement, military, and civilian customers receive a product they can rely on.
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Barrel CoatingSalt Bath Nitride
Barrel ContourMedium
Barrel Length14.5
Barrel LiningSalt Bath Nitride
Barrel Material41V50 Chrome Moly Vanadium Steel
BrandAero Precision
Caliber Gauge5.56 NATO
Gas System LengthMid-Length
Gas System TypeDirect Impingement
Handguard12 in M-LOK Rail
Muzzle DeviceVG6 Epsilon SL
Thread Pattern1/2 X 28
Twist Rate1:7

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