Battle Arms Development Workhorse Upper Receiver Features The Battle Arms Development Workhorse Upper Receiver is machined from aluminum for a lightweight yet durable foundation suited to AR15 and M4 pattern rifles. Finished in an OD Green anodized coating the receiver offers a distinctive look that stands apart from a standard black upper while still providing the same corrosion resistance anodizing is known for. Battle Arms Development built the Workhorse line with an emphasis on reliability under hard use reflecting the name s promise of dependable performance. Because the upper ships stripped builders retain full control over barrel length gas system and handguard choices. Pairing this OD Green upper with a matching lower or other OD Green components allows builders to create a cohesive color themed rifle without needing custom Cerakote work. The Workhorse upper is designed to fit standard AR15/M4 pattern lowers so compatibility with existing parts and accessories is straightforward. Battle Arms Development has built a reputation among AR builders for components that hold up to demanding use while maintaining tight tolerances. This Battle Arms Development Workhorse Upper Receiver is available for sale at GrabAGun for builders seeking a distinctive OD Green foundation for their next AR project. Battle Arms Development Workhorse Upper Receiver Specifications Manufacturer: Battle Arms Development Model: Workhorse Upper Receiver Type: Stripped Upper Receiver Material: Aluminum Receiver Finish: OD Green Anodized Compatible Hosts: AR15 / M4 Available At: GrabAGun