Crafted for durability and precision, the Mil-Spec flat top upper receiver from Stern Defense is designed to enhance your firearm's performance. Constructed from high-quality 7075-T6 aluminum and finished with a rugged hard-coat anodization, this receiver ensures exceptional strength and longevity. It features a Stern Defense laser-engraved dust cover and a forward assist for added functionality and reliability. The interior bore is treated with a Mil-Spec dry film lubricant, reducing friction and ensuring smooth operation. Engineered for shooters who demand quality and performance, this upper receiver is built to withstand the toughest conditions while delivering consistent results. 7075-T6 aluminum, a high-strength alloy used for superior strength, resistance to corrosion and long lasting durability Hard coat anodized, providing a durable finish that increases resistance to wear and corrosion Sturdy construction, offering enhanced durability and strength for dependable firearm use