DIAMONDBACK DB15 BLACK GOLD SERIES MULTI CALIBER STRIPPED LOWER RECIEVER FOR AR-15 The Diamondback DB15 Lower Receiver (Multi-Cal Black/Gold Series) is a precision-machined AR-15 lower designed to support a wide range of calibers while maintaining durability and consistency. Manufactured from forged 7075-T6 aluminum, this lower receiver features a black hardcoat anodized exterior paired with enhanced internal components associated with Diamondback’s Black/Gold Series. The “Black/Gold” designation refers to upgraded internal finishes rather than external color accents, delivering improved wear resistance and long-term reliability. This multi-caliber lower is compatible with standard AR-15 components and is an excellent foundation for custom builds, replacements, or OEM configurations. FEATURES AR-15 Stripped lower receiver Multi-caliber compatible Forged 7075-T6 aluminum construction Black hardcoat anodized exterior Black/Gold Series internal component finishes Precision-machined to mil-spec dimensions Compatible with standard AR-15 fire control components SPECS Platform: AR-15 Caliber Marking: Multi-Caliber Receiver Material: Forged 7075-T6 Aluminum Finish: Black Hardcoat Anodized Series: Black/Gold Product Type: Stripped Lower Receiver