ATI Omni Hybrid Maxx – Complete AR Pistol Lower Receiver, 5.56 NATO / Multi-Cal

The ATI Omni Hybrid Maxx is a lightweight, reinforced polymer AR pistol lower receiver that offers a perfect balance of strength and affordability. Featuring ATI’s hybrid construction with reinforced steel in key stress points, this lower is engineered to handle the demands of 5.56 NATO and other AR-15 compatible calibers.

This complete lower comes equipped with a mil-spec trigger group, polymer grip, and standard safety selector, making it ready to pair with any compatible AR upper receiver. Its polymer build keeps weight to a minimum while maintaining durability, making it an excellent foundation for compact AR pistol builds or lightweight range projects.

Whether you’re looking to start your first AR pistol build or want a budget-friendly foundation for a custom project, the ATI Omni Hybrid Maxx delivers proven reliability with modern innovation.

Specifications