The Battle Arms Development Workhorse 16" 5.56 Upper Receiver is engineered for exceptional performance and reliability. Crafted from 7075-T6 aircraft-grade aluminum, this complete upper features a free-float M-LOK handguard for versatile accessory mounting. The durable 16" barrel is made from 4150 chrome-moly steel with a black nitride finish, ensuring both accuracy and longevity. Each upper is equipped with a Bad Rack-15 ambidextrous charging handle and a premium AR-15/M16 bolt carrier group for seamless operation. Whether for tactical applications or recreational shooting, this upper receiver provides the reliability and performance required by serious shooters.