ATI AR15 Multiple Caliber Stripped Metal Reinforced Polymer Upper Receiver

The ATI AR15 Multiple Caliber Stripped Metal Reinforced Polymer Upper Receiver serves as a lightweight foundation for modern sporting rifle builds. Designed for shooters looking to reduce the overall weight of their firearm without sacrificing structural integrity, this component is ideal for hunters, competitive shooters, and enthusiasts who value maneuverability. By utilizing advanced materials, American Tactical Inc offers a versatile solution for those building a custom AR-15 platform from the ground up.

This upper receiver features a hybrid construction that combines the weight-saving benefits of polymer with the strength of metal reinforcements in critical high-stress areas. The metal reinforcement ensures that the barrel extension and bolt carrier group interface securely, maintaining reliable headspace and cycling over extended use. As a stripped component, it provides a clean slate for builders to install their preferred forward assist, port door, and charging handle to meet specific performance requirements.

Engineered for broad compatibility, the ATI AR15 Multiple Caliber Stripped Metal Reinforced Polymer Upper Receiver is designed to function with standard AR-15 lower receivers and various calibers. Its lightweight 0.55-pound profile makes it an excellent choice for builds where every ounce matters, such as a trek-ready predator rifle or a fast-handling tactical carbine. Installation follows standard mil-spec patterns, ensuring that aftermarket handguards and barrels seat properly for a precise and functional finished assembly.