Sig Sauer P320 XCOMPACT / SUBCOMPACT 9mm 4.3" Threaded Barrel - LCI

Sig Sauer P320 XCOMPACT / SUBCOMPACT 9mm 4.3" Threaded Barrel - LCI

Upgrade your SIG P320 with the 4.3" Threaded Barrel—designed for shooters who demand versatility, precision, and suppressor-ready capability. Chambered in 9mm and built to fit P320 XCOMPACT and Sub-Compact models with a Loaded Chamber Indicator (LCI), this barrel offers a seamless drop-in installation for enhanced performance and customization.

Whether you're prepping for suppressed shooting or simply want extended barrel length for improved velocity and accuracy, this Nitron-finished barrel delivers. The 1/2x28 RH thread pitch makes it compatible with a wide range of muzzle devices and suppressors, while the included thread protector ensures safe carry and storage when not in use. Built to SIG’s exacting standards, it’s a reliable upgrade for any P320 configured for a 3.6" barrel.

Suppressor-Ready Threading
1/2x28 RH thread pitch supports most common muzzle devices and suppressors.

Extended Barrel Length
4.3" barrel offers improved ballistic performance over standard compact barrels.

Drop-In Installation
Easily replaces your existing barrel with no gunsmithing required.

Loaded Chamber Indicator (LCI)
Ensures compatibility with models featuring LCI for added safety.

Thread Protector Included
Protects barrel threads during transport or non-suppressed use.

Durable Nitron Finish
Provides corrosion resistance and a sleek black appearance.

SIG Factory Quality
Built to OEM specifications for flawless fit and function.

Specifications

• Model: P320
• Barrel Length: 4.3 in (109.22 mm)
• Threaded Barrel: Yes
• Thread Pitch: 1/2 in - 28 tpi RH
• Caliber: 9mm Luger
• Loaded Chamber Indicator: Yes
• Color: Black
• Barrel Finish: Nitron
• Compatibility: P320 XCOMPACT / SUBCOMPACT with LCI, or any P320 designed for 3.6" 9mm barrel
• Included Accessories: Thread Protector Cap