Stag 15 Stripped Lower Receiver, Mil-Spec Overview The Stag 15 Stripped Lower Receiver is the foundation for your next AR-15 build. Precision-machined to strict Mil-Spec standards, this lower offers superior quality and compatibility with all standard AR-15 parts and components. Built for reliability and long-term performance, it’s the ideal starting point for custom rifle configurations. Key Features - Precision-machined Mil-Spec stripped lower receiver - Compatible with all Mil-Spec AR-15 parts and components - Durable construction for long-lasting performance