Battle Arms Development Workhorse AR-15/M4 OD Green Anodized Stripped Upper Receiver

The Battle Arms Development Workhorse WH556-URS-ODG is a stripped upper receiver for the AR-15/M4 platform, delivering the forged receiver foundation of the Workhorse line for a custom build. Forged from 7075-T6 aircraft-grade aluminum and finished in OD Green Type III hard-coat anodizing, it carries the signature Workhorse top-notch profile and the durability to back a hard-use build.

An integrated M4 feed ramp supports reliable feeding across the AR-15/M4 family. Sold as a stripped upper, the WH556-URS-ODG is the receiver shell only - the builder specifies the rest of the upper to match the intended configuration. The Type III hard-coat anodized finish provides wear and corrosion resistance suited to range and field use.

Built to standard AR-15 upper receiver dimensions, the WH556-URS-ODG installs on an AR-15 lower receiver and accepts standard-pattern barrel nuts, handguards, and muzzle devices. The OD Green anodized finish matches the broader Workhorse line for builders putting together a coordinated setup.