Engineered for superior performance, this match-grade upgrade barrel is meticulously machined from 416R stainless steel — the industry standard for high-accuracy firearm components. Finished with a sleek Black Nitride coating, it offers exceptional durability, wear resistance, and protection against corrosion.
Designed for flawless compatibility with all 9mm ammunition types, including +P, this barrel delivers enhanced performance without compromising reliability. With no Loaded Chamber Indicator (LCI), it maintains a clean, streamlined profile preferred by many shooters.
Installation is effortless — this 3.1” drop-in barrel matches the factory size for a perfect fit with no gunsmithing required.
- Match-grade precision for consistent accuracy
- 416R stainless steel construction for long-term performance
- Black Nitride finish for enhanced strength and corrosion resistance
- +P rated and tested for all 9mm loads
- No LCI for a cleaner, more traditional barrel profile
Upgrade your Sig Sauer P365 with our precision-machined P365 Steel Barrel, crafted from 416R stainless steel and finished in black nitride for exceptional durability and corrosion resistance. Engineered as a drop-in upgrade, this 3.1” barrel delivers match-grade performance without the need for gunsmithing.
Tested extensively with a wide range of 9mm ammunition — including 50gr, 115gr, 124gr, 125gr, 147gr, and +P loads — this barrel ensures maximum reliability and performance under all conditions. Its clean profile features no Loaded Chamber Indicator (LCI) for a streamlined appearance and improved user experience.
Whether you're enhancing your EDC setup or building a more accurate range pistol, the P365 Steel Barrel is a Made in the USA solution designed to give you the performance and confidence you demand.
Sig Sauer P365 Resources:
If you're getting the Sig Sauer P365 Threaded Barrel and Compensator, then you might find the following Sig Sauer P365 Resources useful in further enhancing your firearm. Download the Sig Sauer P365 Owners Manual or use the Sig Sauer P365 Exploded View as a Parts Diagram to plan your next firearm project.
Drop Tested and Approved:
Sig P365 Precision Steel Barrel is drop Tested according to SAAMI Standard Z299.5 rating (12" & 48").
Tested and Approved:
The Sig P365 Precision Steel Barrel has been tested repeatedly to ensure reliable operation and safety.
ATTENTION:
You must be 18 yrs of age to purchase. We advise that all parts purchased from our inventory be installed and inspected by a qualified gunsmith. Modifying your weapon may be prohibited in your state. Do not modify your sear or hammer engagement surfaces, with or without the Sig P365 Precision Steel Barrel. Before installing please be sure to check all local state and federal laws. By installing this part you agree to take full responsibility for any and all legal, health and warranty consequences that may be incurred.
Does this come threaded?
No, this does not come threaded.
Answered by
FOXX /
May 5, 2026 12:09 PM
Is this a rifled barrel like the Sig stock barrel?
Lukles November 24, 2025 8:02 PM
YES - The barrel is rifled.
Will yall be making a 3.7 barrel?
Please email us - help@mcarbo.com and we will add your interest to our product idea board.
Fit on p365 x macro comp.
Good Morning,
Yes it should fit in the xmacro comp.
Will this fit a p365 x macro
NO, The standard barrel length for the X Macro is 3.7 inches
Answered by
FOXX /
April 28, 2025 2:52 PM