The True Precision TP-P365B-XC is a precision 9mm barrel built for shooters who demand accuracy and reliability from their SIG Sauer P365. This drop-in replacement barrel is engineered and manufactured entirely in the USA from 416R stainless steel, designed to fit the standard P365 3.1-inch frame, P365 SAS, and P365X models. Whether you're training, competing, or carrying for personal defense, a quality aftermarket barrel can tighten your groups and give you confidence in your carry gun's performance.

True Precision's proprietary broach cut rifling is the heart of this barrel's accuracy potential. The 6-groove design handles any ammunition type safely—including cast lead rounds—without the restrictions of traditional button-cut barrels. The 1/10 right-hand twist is optimized for 9mm ballistics and pairs with a deep target crown (on non-threaded versions) to support consistent shot placement. Installation is straightforward; this is a true drop-in design that requires no gunsmithing.

The threaded version includes a Viton O-ring lock thread protector to keep your threads clean and protected when running unsuppressed. Both versions feature a SAAMI-spec chamber for reliable feeding and extraction across factory and handloaded ammunition. At 3.62 inches from chamber to muzzle and just 2.3 ounces (without protector), the barrel maintains the P365's handling characteristics while delivering the precision you'd expect from a purpose-built component.

If you own a P365 and want to upgrade beyond stock, this True Precision barrel represents genuine American engineering focused on the shooter's mission—whether that's tighter groups at the range, smoother reliability in daily carry, or confidence that your defensive gun performs exactly as intended.

Key Features

• Drop-in design fits P365 (3.1"), P365 SAS, and P365X models
• Advanced proprietary broach cut rifling for enhanced accuracy potential
• 6-groove design safe for all ammo types, including cast lead
• 100% USA designed and manufactured from 416R stainless steel
• Deep target crown (non-threaded) or 1/2x28 threads with included Viton O-ring protector (threaded)
• SAAMI spec chamber for reliable feeding and extraction
• 1/10 right-hand twist optimized for 9mm

Specifications

Caliber	9mm
Twist Rate	1/10 RH
Rifling	6-groove broach cut
Barrel Length (chamber to muzzle)	3.62"
Weight (without thread protector)	2.3 oz
Material	416R stainless steel
Thread Option	Non-threaded or 1/2x28 (includes Viton O-ring protector)
Chamber	SAAMI spec
Fit	SIG Sauer P365, P365 SAS, P365X (not P365 XL)
Country of Origin	USA

Frequently Asked Questions

Will this barrel fit my P365 XL?

No. This barrel is designed for the standard P365 (3.1"), P365 SAS, and P365X models only. The 3.1-inch length will not fit the P365 XL, which uses a 3.7-inch frame.

Is this a true drop-in barrel or does it need gunsmithing?

This is a true drop-in design. No gunsmithing or special tools are required for installation on compatible P365 models.

Can I shoot cast lead ammunition through this barrel?

Yes. The 6-groove broach cut design is safe for all ammunition types, including cast lead rounds, without the copper fouling concerns common to button-cut barrels.

What comes with the threaded version?

The threaded 1/2x28 version includes a Viton high heat integral O-ring lock thread protector to protect your threads when running unsuppressed.