The Aero Precision M5 Assembled Upper is a partially assembled upper receiver designed for AR-10-style rifles, providing the core components necessary for builders to complete their firearm. As an assembled upper, it includes the upper receiver with pre-installed components such as the forward assist and ejection port cover. However, it does not include the barrel, handguard, gas system, or bolt carrier group (BCG), allowing users to customize these components to suit their specific needs. Crafted from high-quality 7075-T6 aluminum, the M5 Assembled Upper is precision-machined to ensure durability and compatibility with a variety of AR-10 components. The receiver features a sleek design with a Type III hard anodized finish for corrosion resistance and long-lasting performance. Its Picatinny top rail allows for easy optics mounting, while the robust construction supports larger calibers like .308 Winchester and 6.5 Creedmoor. The Aero Precision M5 Assembled Upper is an excellent choice for builders who want a reliable, high-quality foundation for their large-frame AR rifle.