The True Precision Drop-In Barrel (True Precision part no. TPP365FBX) is a 4.3-inch, satin stainless steel barrel chambered in 9mm Luger and purpose-built for the Sig Sauer P365-Fuse. True Precision machines every barrel with advanced cuts, chamfers, and a refined feed ramp designed to outperform the factory-original Sig barrel and feed a wider range of ammunition designs without hiccups. The 1:10-inch right-hand twist rate is matched to common 9mm bullet weights for consistent, repeatable accuracy. It is a drop-in upgrade, so P365-Fuse owners get a real accuracy and reliability boost for target work, competition, or daily carry without any gunsmith fitting.

Key Specifications

• Chambered in 9mm Luger.
• Measures 4.3 inches, sized for the Sig P365-Fuse.
• Cut with a 1:10-inch right-hand twist rate for consistent accuracy.
• Finished in satin stainless steel.
• Machined with advanced cuts and chamfers to outperform the factory barrel.
• Features a refined feed ramp designed for reliable feeding across ammunition types.
• Built specifically for the Sig Sauer P365-Fuse model.
• Installs as a drop-in replacement, requiring no gunsmith fitting.

Frequently Asked Questions

What pistol does this barrel fit? The Sig Sauer P365-Fuse.

What caliber is this barrel chambered in? 9mm Luger.

Does it require gunsmith fitting? No, it installs as a drop-in replacement barrel.

Buy the True Precision P365-Fuse Drop-In Barrel

Upgrade your P365-Fuse’s accuracy and reliability with a match-machined barrel built to outperform the factory original. See more from True Precision or shop our full handgun barrels selection. Order it from our Lubbock, Texas gun shop for fast, insured shipping.