5.5″ 45 ACP 1:16 Twist 4150 Barrel

Description

This 5.5-inch barrel is chambered in 45 ACP, providing a compact solution for builders seeking a shorter overall platform. Constructed from 4150 Chrome Moly Vanadium steel, the barrel offers the necessary tensile strength and durability for repeated firing cycles. The 4150 material is treated with a black Nitride coating, which enhances corrosion resistance and surface hardness while maintaining a low-profile aesthetic. The barrel features ACP 1:16 Twist rate, which is suitable for stabilizing a wide range of 45 ACP bullet weights. It maintains a straight profile throughout its length, ensuring consistent dimensions for handguard compatibility and a uniform weight distribution. The muzzle end is prepared for device attachment, though specific thread pitch data is not provided in the source specifications. Key specifications include a total weight of 9.6 oz, which contributes to the front-end balance of the upper receiver. The pattern is solid, indicating a standard construction without gas block integration, allowing for flexible gas system configuration during assembly. This component is intended for integration into a complete AR-15 style upper receiver, requiring proper headspacing and staking by the builder.

• Material: 4150 Chrome Moly Vanadium steel
• Calibre: 45 ACP
• Length: 5.5 inches
• Twist Rate: 1:16
• Finish: Black Nitride
• Weight: 9.6 oz
• Profile: Straight