Ballistic Advantage Threaded Barrel w/ Spiral Fluting for SIG P365XL / XMacro | Copper | LCI

Ballistic Advantage Threaded Barrel w/ Spiral Fluting for SIG P365XL / XMacro | Copper | LCI

The Ballistic Advantage Threaded Barrel with Spiral Fluting for SIG P365XL and P365 XMacro combines a distinctive spiral-machined exterior with a Copper PVD finish and 1/2×28 muzzle threads. Designed for compatible slide assemblies that use a Loaded Chamber Indicator, this Premium Series barrel is a strong choice for custom P365XL and XMacro builds where the barrel finish and exterior machining are intended to be visible.

The spiral fluting is the defining feature of this configuration. Its continuous helical machining creates a noticeably different appearance from Ballistic Advantage’s Bomber-fluted and non-fluted P365 barrels, especially when paired with aftermarket slides that expose more of the barrel through windows or relief cuts.

Machined from hardened 416R stainless steel, the barrel is honed, lapped, and tumbled to produce a smooth bore surface and requires no manufacturer-prescribed break-in period. A 1:10 twist rate and SAAMI-spec 9mm chamber complete the precision-focused internal geometry.

The Copper PVD finish provides a durable protective coating while adding a high-contrast metallic appearance. Combined with the spiral-fluted profile, it gives this barrel a more decorative and custom-oriented character than Ballistic Advantage’s subdued Black QPQ offerings.

Key Features

• Threaded barrel for SIG P365XL and P365 XMacro
• Designed for compatible slides using a Loaded Chamber Indicator
• Distinctive spiral-fluted exterior profile
• Copper PVD finish
• Hardened 416R stainless steel construction
• Chambered in 9mm
• 1/2×28 muzzle threads
• 1:10 twist rate
• Approximately 4.2-inch threaded overall length
• SAAMI-spec chamber
• Honed, lapped, and tumbled bore
• No manufacturer-prescribed break-in period

Spiral-Fluted P365XL Barrel

The spiral-machined exterior gives this barrel its primary visual identity. The continuous fluting pattern creates a flowing profile that stands apart from angular Bomber fluting and smooth non-fluted alternatives, making it particularly well suited to custom P365XL and XMacro builds.

Copper PVD Finish

The Copper PVD coating adds a warm metallic contrast that is especially visible through windowed or aggressively machined slides. It pairs naturally with black, gray, FDE, and other darker components where the barrel is intended to become part of the overall design.

LCI Threaded Configuration

• LCI-compatible barrel configuration
• Thread pitch: 1/2×28
• Threaded overall length: approximately 4.2 inches
• Fluting: Spiral
• Finish: Copper PVD
• Verify slide, LCI, and muzzle-device compatibility before installation

Compatibility

• SIG P365XL
• SIG P365 XMacro
• SIG P365 XMacro TACOPS
• Compatible XL-length slide assemblies using a Loaded Chamber Indicator
• Compatible 1/2×28 9mm muzzle devices when proper clearance requirements are met