The True Precision Stainless Steel 9MM Barrel for Sig P320 Compact is a USA-made drop-in upgrade designed to tighten your handgun's accuracy without sacrificing reliability. Built from certified 416R stainless steel and engineered specifically for the P320 Compact, X-Carry, and M18 platforms, this barrel replaces your factory tube with a precision-broached alternative that delivers measurable improvements in fit and function right out of the box. Whether you're running the range or hitting steel in competition, a quality barrel upgrade is one of the most straightforward ways to unlock your P320's potential.

True Precision engineered this barrel with a proprietary broach cut design and 6-groove rifling optimized for accuracy while safely handling all 9mm ammunition types—including cast lead rounds. The 3.87" length maintains the Compact's handling characteristics while the 1/10 RH twist rifling provides stable performance across the velocity range. You'll notice the fit immediately: True Precision machines added chamfers, radius cuts, and other refinements that exceed OEM tolerances, eliminating the slop that plagues factory P320 slides. The barrel retains the Loaded Chamber Indicator cut found on the M18, preserving interchangeability across your P320 lineup if you run multiple variants.

Installation is straightforward—this is a true drop-in design with no permanent modifications required. Choose your crown style based on your platform: the 11-degree competition target crown for standard non-threaded versions, or opt for the threaded 1/2x28 version with Viton O-ring lock thread protector included. Either way, you're getting a barrel finished and tested in the USA, backed by the kind of fit quality that makes upgrading your P320 feel like stepping up to a better-built gun.

Key Features

• Drop-in design fits Sig P320 Compact, X-Carry, and M18 platforms with no permanent modifications
• Proprietary broach cut and 6-groove rifling optimized for accuracy
• Certified 416R stainless steel, 100% designed and manufactured in the USA
• Improved fit over factory barrel with added chamfers and precision radius cuts
• Loaded Chamber Indicator cut preserved for cross-platform interchangeability
• Safely handles all 9mm ammunition types, including cast lead
• 11-degree competition target crown (non-threaded) or 1/2x28 threaded with included protector
• SAAMI spec chamber ensures safe, reliable performance

Specifications

Caliber	9mm
Rifling	6 groove, 1/10 RH twist
Barrel Length	3.87" (breechface to muzzle)
Material	Certified 416R Stainless Steel
Crown Options	11-degree competition target crown (non-threaded) or 1/2x28 threaded
Thread Protector	Included on threaded versions (Viton O-ring lock design)
Chamber	SAAMI specification
Compatibility	Sig P320 Compact, X-Carry (some models may require minor fitting), M18

Frequently Asked Questions

Will this barrel work with my Sig P320 X-Carry or X-Compact?

This barrel is designed for the P320 Compact, X-Carry, and M18. It will not fit the X-Compact. Some X-Carry models may require minor fitting; it's a good idea to confirm with the seller or check True Precision's fitment resources before ordering if you're unsure about your specific slide variant.

Is this a true drop-in, or do I need a gunsmith?

This is a drop-in design, meaning it does not require permanent modifications to your slide or frame. Installation can typically be completed without professional gunsmithing, though some X-Carry models may require light fitting as noted.

Can I use cast lead ammunition with this barrel?

Yes. The 6-groove broach cut rifling is specifically engineered to handle all ammunition types safely, including cast lead rounds.

What's the difference between the threaded and non-threaded versions?

The non-threaded version features a standard 11-degree competition target crown. The threaded version includes 1/2x28 threads and comes with a Viton O-ring lock thread protector to keep your threads clean and protected when you're not running a suppressor or muzzle device.