True Precision SIG P320 Compact, X-Carry & M18 3.9" Threaded Barrel — Black DLC
Not Yet Rated | Write the First Review SKU: 222-TRU-TP-P32CB-XTBC
UPC: 719000000000
MFG#: TP-P32CB-XTBC

SIG P320 Compact, X-Carry & M18 3.9" Threaded Barrel — Black DLC

You want a threaded barrel that runs clean, fits right, and keeps its finish after real use. This True Precision barrel is built for the 3.9" P320 Compact length class, including many X-Carry and M18 9mm setups, with a 1/2x28 muzzle for common 9mm accessories where legal.

Finish: Black DLC (Required)
Coating: Diamond-Like Carbon (DLC)
Part number: TP-P32CB-XTBC
Threads: 1/2x28
Overall threaded length: 4.64" (without thread protector attached)

Why Black DLC

DLC stands for Diamond-Like Carbon. Shooters choose it because it holds up well to holster wear, resists corrosion, and has a slick surface that cleans up easier after long range days. It’s a practical finish that also looks sharp on almost any slide.

What this barrel brings to your P320

True Precision barrels focus on the details that matter in day-to-day shooting: consistent lockup, smooth feeding, and careful finishing where the gun actually cycles. If you’re upgrading from OEM, the goal is a noticeable improvement in feel and performance without turning the build into a project.

Highlights

• Built for P320 Compact length class (3.9"), commonly used with Compact, X-Carry, and M18 9mm configurations

• 416R stainless steel construction

• Broach-cut 6-groove rifling

• 1/10 RH twist

• SAAMI-spec 9x19 chamber

• Thread protector included with high-heat integral O-ring lock

Compatibility notes (read before ordering)

• No-LCI barrel configuration: Some loaded chamber indicator setups may require modification or removal of the LCI to function correctly with a no-LCI style barrel. If you’re not sure what your slide uses, a qualified armorer or gunsmith can confirm quickly.

• X-Carry tolerance variation: Minor fitting can be required on some X-Carry slides due to normal manufacturing variation.

Always verify local laws for threaded barrels and muzzle devices. After installation, function test your setup with your chosen ammo.

Specifications

• Caliber: 9mm (9x19)

• Fit class: P320 Compact length class (3.9"), commonly used with Compact, X-Carry, and M18 9mm setups

• Overall threaded length: 4.64" (without thread protector attached)

• Thread pitch: 1/2x28 RH

• Material: 416R stainless steel

• Rifling: Broach cut, 6-groove

• Twist rate: 1/10 RH

• Finish: Black DLC (Diamond-Like Carbon)

• Part number: TP-P32CB-XTBC

• Included: Thread protector with integral O-ring lock

What’s included

• Threaded barrel in Black DLC finish

• Thread protector

FAQ

Is this the Black DLC (Required) version?
Yes. This page is for the Black DLC finish and part number TP-P32CB-XTBC.

What does DLC mean?
DLC is Diamond-Like Carbon, a coating known for wear resistance, corrosion resistance, and a slick surface that’s easy to maintain.

Will it fit my P320 Compact, X-Carry, or M18?
It’s designed for the 3.9" P320 Compact length class and is commonly used with Compact, X-Carry, and M18 9mm configurations. Confirm your barrel length and slide style before ordering.

What thread pitch is it?
1/2x28 right-hand.

Will it work with an LCI slide?
Some LCI-equipped setups may need LCI modification or removal because this is a no-LCI barrel configuration. If you’re unsure, consult a gunsmith or armorer.

Does it include a thread protector?
Yes, a thread protector is included.