Product Description The Aero Precision M5 Complete Upper Receiver is a purpose-built, lightweight .308 Winchester platform engineered for serious shooters who demand precision and reliability. This complete upper features the ATLAS S-ONE handguard, designed with size and weight in mind, making it the perfect addition to any lightweight build. The proprietary ATLAS attachment system provides a durable and dependable mounting platform, maintaining a slim profile while delivering the strength and stability that Aero Precision handguards are known for. Finished in a striking Cerakote Flat Dark Earth (FDE) coating, this upper is as tough as it is attractive. The 16" .308 barrel is crafted from 4150 Chrome Moly Vanadium steel with a QPQ corrosion-resistant finish and comes complete with a low-profile gas block and mid-length gas tube. This complete upper comes fully assembled and ready to pair with your lower - please note it does not include a BCG or Charging Handle. Product Highlights M5 Forged Upper Receiver: Forged from 7075-T6 aluminum with M4 feedramps, .2795 takedown pin holes, DPMS High Profile (.210) tang, port door, and forward assist for rugged durability. ATLAS S-ONE Handguard: Lightweight and slim design with a full top Picatinny rail, quick-disconnect sling sockets at the 3, 6, and 9 o&';clock positions, and compatibility with low-profile gas blocks. 16" .308 CMV Barrel: 4150 Chrome Moly Vanadium construction with a QPQ corrosion-resistant finish, 1-in-10 twist rate, 5/8x24 threading, and HP/MPI tested for quality assurance. Cerakote FDE Finish: Premium Cerakote Flat Dark Earth coating provides outstanding corrosion and wear resistance while delivering a consistent, professional appearance. Ready to Install: Ships fully assembled with a low-profile gas block and mid-length gas tube; simply pair with your preferred .308/AR-10 lower receiver (BCG and Charging Handle sold separately). Specs Brand: Aero Precision Manufacturer Part Number (MPN): APAR538715M22 UPC: 840014609628 Caliber: .308 Winchester Barrel Length: 16" Barrel Material: 4150 Chrome Moly Vanadium (CMV) Barrel Finish: QPQ Corrosion Resistant Twist Rate: 1 in 10 Muzzle Threading: 5/8 x 24 Gas System: Mid-Length Gas Block Journal: .750 Handguard: ATLAS S-ONE Upper Receiver Material: 7075-T6 Aluminum Finish/Color: Cerakote Flat Dark Earth (FDE) Weight: 36 oz Country of Manufacture: United States Condition: New Includes: Assembled upper receiver, ATLAS S-ONE handguard, 16" barrel, low-profile gas block, mid-length gas tube Does Not Include: Bolt Carrier Group (BCG), Charging Handle Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>