Diamondback DB2210R001 DB15 Lower Receiver Multi 7075-T6 Aluminum Black

The Diamondback DB2210R001 DB15 Lower Receiver Multi 7075-T6 Aluminum Black is a precision-machined firearm component engineered for shooters and gunsmiths building or completing AR-platform rifles. This lower receiver serves as the regulated firearm component and serialized foundation of any modern tactical rifle system, essential for those seeking a quality American-made alternative to mainstream manufacturers. Whether you're assembling a dedicated patrol rifle, competition platform, or home-defense build, this lower receiver provides the structural integrity and dimensional accuracy required for reliable operation across multiple caliber conversions.

Constructed from aerospace-grade 7075-T6 aluminum alloy, the DB2210R001 delivers superior strength-to-weight characteristics without sacrificing durability in high-round-count environments. The 7075-T6 specification is critical—this heat-treated aluminum variant provides hardness and tensile strength comparable to lower-end steel platforms while maintaining the weight advantage essential for tactical carbines and lightweight duty rifles. The "Multi" designation indicates this receiver accommodates multiple upper receiver caliber configurations, allowing single-platform flexibility for .223 Remington, 5.56 NATO, and other common AR-compatible cartridge conversions. At 0.8 lbs, this component contributes minimal mass to your overall rifle system, supporting faster target transitions and reduced operator fatigue during extended patrol or training cycles.

This lower receiver is ideal for law enforcement armorsmiths, military personnel, competitive shooters, and civilian builders seeking reliable component-level quality for AR-15 platform assembly. Installation requires matching with a compatible upper receiver assembly and standard AR trigger group components—no specialized tools beyond basic gunsmithing equipment are necessary. The compact footprint (5.3 x 3.2 x 10.5 inches) ensures seamless integration with milspec furniture and aftermarket accessories, maintaining dimensional consistency across your build. Verify local and federal compliance requirements regarding lower receiver registration and serialization before purchase, as regulatory status varies by jurisdiction.