Black Diamond Armory BDA-M4 Stripped Lower Receiver
Proudly manufactured in Stewartville, Minnesota, the BDA-M4 lower receiver is built to mil-spec standards and refined with upgraded details to make your build smoother and better looking from the start.
The receiver showcases a clean, deep-etched BDA Spartan logo on the magwell, paired with sharp, professional roll marks including 3-position safety engravings (SAFE, SEMI, AUTO). The matte hard-anodized finish is even and resilient, giving it both a tactical look and long-lasting durability. Every line and cut reflects precise machining, offering a receiver that feels as good as it looks.
Enhanced touches—like the threaded bolt catch pin—make assembly easier while keeping your rifle clean and professional. Whether you’re starting a new build or adding another rifle to your collection, this lower is the perfect locally-made foundation.
Features:
Made in Stewartville, MN by Black Diamond Armory
True mil-spec compatibility for AR-15 builds
Bold BDA Spartan logo engraving
Crisp anodized finish for durability and clean aesthetics
Enhanced threaded bolt catch for simplified assembly
3-position selector engravings: SAFE / SEMI / AUTO
Model: BDA-M4 | Caliber: Multi