The Diamondback Firearms DB15 Stripped AR-15 Lower Receiver (model DB2210R001, UPC 810035754829) is a rock-solid foundation for your next AR build. Made in the USA from forged 7075-T6 aluminum with a matte black anodized finish, this multi-caliber lower gives you the strength, compatibility, and clean aesthetics you want for a truly custom rifle or pistol. Palmetto State Armory+2Classic Firearms+2
Whether you’re assembling a lightweight 5.56 carbine, a .223 Wylde precision rig, or a .300 Blackout home-defense setup, this DB15 stripped lower is built to mil-spec dimensions so it plays perfectly with standard AR-15 parts and uppers. Classic Firearms+2Rifle Supply+2
Key Features – Diamondback DB15 Stripped Lower Receiver (DB2210R001)
Forged 7075-T6 Aluminum – Built for Hard Use
The DB15 stripped lower receiver is forged from 7075-T6 aluminum, the same alloy used in many duty-grade AR platforms and military-spec receivers. Palmetto State Armory+2Classic Firearms+2
Why that matters:
Higher strength-to-weight ratio than 6061 billet receivers
Better resistance to impact, flex, and long-term fatigue
Ideal for rifles that will see heavy training, competition, or defensive use
If you’re serious about reliability and longevity, a forged 7075-T6 lower like this Diamondback DB15 is exactly what you want at the heart of your build.
Mil-Spec Dimensions & Multi-Caliber Flexibility
This lower is built to mil-spec dimensions, which means it’s compatible with most AR-15: Gary's Gun Shop+3Classic Firearms+3Rifle Supply+3
Upper receivers (5.56, .223 Wylde, .300 BLK, etc.)
Lower parts kits
Triggers and fire control groups
Buffer tubes, braces, and stocks
The multi-caliber marking gives you the flexibility to configure this lower with a variety of uppers over its lifetime:
5.56 NATO / .223 Rem – classic carbine or patrol rifle builds
.300 Blackout – suppressed SBR or pistol builds
Other AR-15 calibers compatible with standard lowers
That versatility makes the DB2210R001 a great choice if you plan to experiment with different uppers or future-proof your collection.
Matte Black Anodized Finish – Durability & Style
Diamondback finishes this DB15 lower in a matte black hardcoat anodizing, which is the industry standard for duty-ready AR receivers. GrabAGun+2Classic Firearms+2
Benefits of the anodized finish:
Corrosion and wear resistance for harsh environments, range use, and field carry
Low-glare, non-reflective surface that blends with most AR uppers and accessories
Clean, professional appearance suited for tactical, competition, or recreational builds
Whether you’re matching it to a Diamondback upper or a different brand, the finish integrates seamlessly with most black AR components.
Stripped Lower – Ideal Starting Point for Custom Builds
The DB15 stripped lower ships as a bare receiver (no trigger, safety, mag release, buffer, or stock), giving you a blank canvas to build your dream AR. Hinterland Outfitters+2Guns.com+2
You’ll add your choice of:
Lower parts kit (LPK) – choose standard mil-spec or an upgraded kit
Trigger – single-stage, two-stage, or match-grade
Grip – ergonomic, rubberized, or minimalist
Receiver extension/buffer system – carbine, rifle, or pistol tube
Stock or brace – anything from lightweight minimalist to precision adjustable
Because it’s mil-spec and multi-caliber, you’re free to configure it for defensive, hunting, competition, or range use without being locked into a single layout.
Made in the USA – Diamondback DB15 Quality
Diamondback Firearms manufactures the DB15 series in the USA, using CNC-machined components and a proven gas-impingement AR design across their complete rifles. Palmetto State Armory+2Diamondback Firearms+2
This stripped lower is part of that same DB15 family, offering:
Consistent machining and tolerances
Proven reliability when paired with quality parts
A trusted name in the AR-15 market
It’s an excellent match if you already own a Diamondback DB15 rifle and want to build another, or if you simply want a reputable, USA-made lower for your next project.
Ideal Uses – What Builds Is This Lower Perfect For?
Thanks to its forged construction, multi-cal marking, and mil-spec geometry, the Diamondback DB15 stripped lower DB2210R001 is a great fit for:
General-purpose 5.56/.223 AR-15 rifles – duty, home defense, or range guns
Lightweight .300 Blackout builds – dedicated suppressor hosts or compact PDWs
Custom competition carbines – where reliability and a strong foundation are essential
Budget-friendly yet durable first builds – a quality lower that doesn’t break the bank
Whether this is your first AR build or your tenth, starting with a solid forged lower is the smart way to ensure your rifle runs right from day one.
Technical Specifications – Diamondback DB15 Lower DB2210R001
Why Choose the Diamondback DB15 AR-15 Stripped Lower?
If you want a strong, reliable, and versatile AR-15 lower that won’t hold back your build, the Diamondback Firearms DB15 Stripped Lower Receiver (DB2210R001) is an excellent choice. You get:
True 7075-T6 forged aluminum strength
Multi-caliber flexibility for 5.56, .223, .300 BLK, and more
Mil-spec compatibility with most AR-15 parts and uppers
A durable matte black anodized finish in a clean, no-frills design
Quality manufacturing from a respected U.S. maker
Use it as the foundation for your next AR—whether that’s a hard-use duty rifle, a sleek competition carbine, or a compact defensive setup—and build with confidence from the lower up.
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