The Aero Precision M5 Complete Upper is a fully assembled upper receiver for AR-10-style rifles, designed to provide convenience and reliability. As a complete upper, it includes all essential components such as the upper receiver, barrel, handguard, and gas system, with some configurations also including a bolt carrier group (BCG) and charging handle. It is ready to attach to a compatible M5 lower receiver, allowing users to quickly assemble a functional rifle without the need for additional components or assembly. Built for durability and precision, the M5 Complete Upper features a 7075-T6 aluminum upper receiver and a handguard with M-LOK slots for mounting accessories. Available in a variety of barrel lengths and calibers, including .308 Winchester and 6.5 Creedmoor, the barrels are made from high-quality materials with finishes like QPQ nitride for extended lifespan and corrosion resistance. The gas system is optimized for each barrel length and caliber, ensuring reliable performance. With its rugged construction, compatibility, and ease of use, the Aero Precision M5 Complete Upper is ideal for shooters building or upgrading a large-frame AR platform.