The Diamondback Firearms DB15 Diamond Series stripped lower receiver in black is the foundation for an AR-15 build, forged from 7075-T6 aluminum and set up as a multi-caliber 223/556/300 Blackout lower (Diamondback Firearms part no. DB2228R001). It arrives stripped, with no lower parts kit and no magazine, so you choose the trigger, grip, stock and furniture. Because the receiver is the regulated part of the rifle, it ships to a licensed dealer rather than to your door. For a builder who wants a forged lower from a U.S. AR maker to start a rifle or pistol project, this is a clean, no-frills place to begin.

Key Specifications

• The material is forged 7075-T6 aluminum, a strong, light alloy that is a common choice for AR lowers.
• The finish is black, which pairs with most uppers and furniture.
• The configuration is stripped, meaning it comes without a lower parts kit, so you pick the parts you want.
• The caliber designation is multi-caliber 223/556/300 Blackout, the designation Diamondback gives this lower.
• It weighs 10 ounces, which is the bare receiver without a parts kit or magazine.

Frequently Asked Questions

Does the lower come with a parts kit? No. This is a stripped lower with no parts kit and no magazine, so you supply the trigger group, grip, stock and other lower components.

What calibers does it support? Diamondback lists it as multi-caliber 223/556/300 Blackout.

How does it ship? As a firearm receiver, it ships to a licensed dealer for transfer.

Buy the Diamondback Firearms DB15 Diamond Series Stripped Lower

A forged lower is the part every AR build hangs on, and this one comes from a maker that builds complete DB15 rifles. See more AR-15 lowers and order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.