Aero Precision M5E1 Barreled Upper .308 Enhanced Gen 2 M-LOK – 18″ – Black


  • 15 inch aluminum M-LOK rail with anti-rotation tabs
  • Includes forward assist and ejection port cover
  • Optics ready with full length Picatinny rail on receiver and handguard
  • 1 in 10 twist barrel
  • Black anodized finish


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SKUAPAR308554M25 Category

You’re a 308 Winchester fan and want to build your own AR-pattern rifle. The only problem is compatibility. Home builds can get problematic quickly, as you have to take time to make sure all your parts are compatible. With this assembled 308 AR upper from Aero Precision, you can shortcut that entire process. This upper receiver includes everything you need except the bolt carrier group and charging handle. The receiver is forged 7075 T6 aluminum that’s been machined to Aero’s specifications. And it comes with an 18″ M5E1 Enhanced profile barrel with a black nitride finish. The Gen 2 Enhanced handguard has M-LOK attachment slots at the 3, 6, and 9 o’clock positions for mounting accessories.

The Aero Precision M5E1Barrel Upper Receiver is a perfect choice for those looking to build a high performance 308 AR. The M5E1 upper receiver is compatible with common DPMS pattern 308 Winchester AR components and features a 18 inch 4150 Chrome Moly Vanadium Steel barrel and rifle length gas system. The handguard is machined out of 6061-T6 aluminum for maximum durability and Picatinny rail runs the entire length of the top of the handguard, giving the shooter ample space for mounting sights, lights, and other accessories.


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