Aero Precision M4e1 Threaded Assembled Receiver Set Ar 15 Multi Caliber Anodized

The Aero Precision M4E1 Threaded Assembled Receiver Set for AR-15 in anodized black brings the M4E1 series� purpose-built engineering to builders and gunsmiths who want a rugged, ready-to-finish foundation that saves time without cutting corners. This assembled receiver set combines Aero's forged M4E1 lower geometry – with an integrated trigger guard and flared magwell for faster reloads – and a matching threaded upper that accepts a wide range of AR-15 barrels and handguards, making it suitable for duty-style carbines, precision varmint rigs, or general-purpose rifles that run multiple cartridges. The hard-anodized black finish resists wear and corrosion while maintaining a consistent appearance for a build intended for range use, training, or field carry, and the precision-machined receiver faces and takedown threads ensure reliable alignment and repeatable accuracy after installation of your choice of bolt carrier group, barrel, and controls. Because this is an assembled receiver set, transfer must be completed through an FFL, and the unit is designed to accept standard AR-15 components and aftermarket upgrades, giving experienced builders the flexibility to configure gas systems, triggers, and accessories to match specific shooting applications. This receiver set is a solid starting point for anyone looking to build an AR-15 with the durability and features associated with the Aero M4E1 family.