Bushmaster M4 Patrolman Upper 556x45mm NATO 20in Complete Upper for AR15

The Bushmaster 0040008BLK M4 Patrolman's Upper in 5.56x45mm NATO delivers a complete upper assembly with a 20-inch Black finish barrel, designed to integrate seamlessly with AR-15 platforms for dependable duty and recreational use. This complete upper features a Black receiver and Black handguards equipped with the M4 Double Head Shield design, offering robust protection and a streamlined profile for reliable handling in field and range scenarios. Optimized for performance, the 20-inch barrel delivers balanced accuracy and velocity across a variety of environments, making it a solid choice for patrol, training, or precision-style shooting as part of a versatile rifle build. The M4 Patrolman's upper combines proven Bushmaster engineering with durable components to support consistent cycling and stable trajectories, while its clean, corrosion-resistant finishes resist the rigors of frequent use. Whether upgrading an existing AR-15 platform or assembling a high-accuracy rifle from the ground up, this upper provides a straightforward path to enhanced range time, tactical readiness, and dependable performance in demanding conditions.