Battle Arms Development BAD556-LR Lower Receiver 223 Rem/5.56 NATO Aluminum Black Anodized

The Battle Arms Development BAD556-LR Lower Receiver in 223 Rem/5.56 NATO represents a precision-engineered foundation for modern rifle builds. Machined from 7075-T6 aluminum and finished in hard-anodized black, this lower receiver provides the controlled, regulated fire group housing that operators and builders depend on when assembling duty-grade or competition-focused platforms.

As a registered firearm under federal law, the lower receiver is the serialized component that legally defines the rifle itself—making receiver quality non-negotiable for builders who prioritize reliability. The 7075-T6 aluminum alloy offers superior strength-to-weight compared to standard 6061-T6, critical when building lightweight configurations without sacrificing structural integrity. Hard anodizing provides corrosion resistance in field environments, from humid temperate operations to dust-laden terrain. Weighing 0.88 lbs and dimensioned at 6.7 x 3 x 10 inches, this receiver integrates seamlessly into standard AR-platform builds chambered in .223 Remington or 5.56 NATO.

This lower receiver serves law enforcement armorer builds, military-grade rifle platforms, and civilian competitive or defensive shooters constructing precision rifles from component parts. Builders sourcing BAD556-LR receivers prioritize quality production tolerances and material specifications that ensure reliable function across thousands of rounds. Whether assembling a patrol carbine, precision rifle, or specialized configuration, the lower receiver is the critical control point that determines the finished firearm's reliability and legality.

Lower receivers must comply with federal firearms manufacturing and possession standards. When purchasing a lower receiver, verify local and state regulations, as certain jurisdictions impose additional controls. Pairing this receiver with compatible upper assemblies, bolt carrier groups, and fire control groups creates a complete functional rifle.