Battle Arms Development Workhorse WH556-LR lower receiver in black anodized aluminum. Precision-machined for AR15/M16/M4 platforms with reliable performance.
The Workhorse WH556-LR lower receiver from Battle Arms Development represents a straightforward, no-nonsense approach to AR15 platform building. This is a tool designed for shooters who understand that a quality lower receiver forms the foundation of a reliable rifle.
This lower receiver is the regulated firearm component that requires proper licensing to purchase. It serves as the foundation for your AR15 build, housing the trigger group, safety selector, and magazine well. Battle Arms Development's Workhorse line emphasizes reliability and straightforward engineering—qualities that matter when your rifle needs to perform.
Pair this lower with a quality upper receiver, bolt carrier group, and furniture to complete your AR15. Whether you're building a practical rifle for sport shooting, training, or home defense, starting with a solid lower receiver ensures your foundation is sound.