4.5″ 45 ACP 1:16 Twist 4150 Barrel

Description

This 4.5-inch barrel is chambered in 45 ACP and features ACP 1:16 Twist rate, designed for specific ballistic performance with heavy bullets. Constructed from 4150 Chrome Moly Vanadium steel, it offers the necessary tensile strength and heat resistance for reliable cycling. The barrel utilizes a straight profile, providing a consistent diameter along its length, which is a common choice for compact builds where weight and balance are managed by other components. The exterior is finished with a black Nitride coating, which enhances corrosion resistance and provides a durable surface without adding significant bulk. Weighing 9.3 oz, this component is optimized for lower-profile applications. The solid pattern ensures a uniform internal geometry, critical for consistent gas dynamics in short-stroke gas systems often associated with this caliber. This barrel is intended for builders who require precise specifications for custom 45 ACP AR-platform builds. The 4150 steel composition and black Nitride treatment ensure longevity under repeated firing cycles. This part is a core component for constructing a compact upper receiver assembly.