Enhance your AR-15 build with the Presma .223/5.56 Stripped Upper Receiver featuring a precision square mark. Crafted for optimal performance, this upper receiver is engineered to meet the highest quality standards. Designed for versatility, the Presma upper receiver provides a solid foundation for your next firearm project, ensuring compatibility with standard AR-15 components. Machined from high-quality aluminum for durability Precision square marking for easy identification Designed for .223 and 5.56 NATO cartridges Compatible with mil-spec parts Elevate your shooting experience with the exceptional reliability of the Presma upper receiver.