The True Precision Fuse 9mm Barrel for Sig P365 is a feature-rich, accuracy-focused upgrade designed for shooters who want more than just “stock performance” from their concealed carry pistol. Precision machined from 416R stainless steel and measuring 4.30" in length, this barrel (Part # TPP365FBXT, UPC 719104541998) delivers enhanced accuracy, improved durability, and a sleek custom look in a true drop-in package for your Sig Sauer P365.
If you’re looking for a premium Sig P365 9mm barrel that offers performance, style, and reliability in one package, the True Precision Fuse is built for you.
Engineered for the Sig Sauer P365 Platform
The True Precision Fuse 9mm barrel is purpose-built to fit the Sig P365 series:
Compatible with Sig Sauer P365 9mm pistols
Designed as a drop-in replacement – no gunsmithing required for most factory slides
Extended 4.30" length gives a slightly longer profile than the standard P365 barrel, enhancing sight radius and giving your pistol a custom appearance
Whether you’re carrying daily or building a high-performance micro-comp, this barrel offers a solid, precision foundation.
416R Stainless Steel – Match-Grade Barrel Material
True Precision uses 416R stainless steel, a favorite in match and custom barrels, because it delivers:
Excellent machinability – Supports highly precise rifling and chamber work
Strong corrosion resistance, particularly important in a concealed carry gun exposed to sweat, humidity, and daily wear
Proven accuracy potential, giving you tighter, more consistent groups with quality ammo
If your P365 is more than just a backup gun—and you actually train with it—416R stainless is exactly what you want in your barrel.
Extended 4.30" Length – Performance and Style
At 4.30", the Fuse barrel is longer than the typical factory P365 barrel:
Offers a slightly increased sight radius when paired with compatible slides, aiding precision
Adds a distinctive custom look, especially on builds where the barrel may be slightly exposed beyond the slide
Provides a little extra velocity boost, helping 9mm defensive loads perform at their best
The extended length is ideal for shooters who want a P365 that stands out visually and performs like a much larger pistol.
Precision-Cut Chamber and Rifling for Better Accuracy
True Precision barrels are known for their tight tolerances and attention to detail:
Match-style chamber geometry helps support more consistent lockup and bullet alignment
Carefully machined rifling is designed to maximize accuracy and repeatability
Helps you get more out of your pistol’s inherent potential—especially with quality 9mm ammo
The result is a barrel that can tighten up your groups and help your P365 punch above its weight class.
Durable Finish Options & Custom Build Potential
While this specific model is 416R stainless at its core, True Precision’s Fuse line is often offered in multiple finish options (depending on retailer availability), such as:
Bead-blasted or polished stainless for a classic, clean appearance
Specialty coatings or colors on some variants (e.g., black, gold, rainbow PVD on other SKUs)
Whichever finish your specific TPP365FBXT barrel comes in, it’s designed to complement custom slides, optics cuts, and upgraded controls—perfect for building a high-end EDC or range-ready micro pistol.
Designed for Everyday Carry & High-Round-Count Training
The True Precision Fuse barrel for P365 is a great choice for:
Daily concealed carry – Built from corrosion-resistant stainless steel for real-world environments
Defensive handgun training – Handles high round counts without sacrificing performance
Competition or performance builds – Ideal for shooters who demand both accuracy and reliability from a compact platform
Your barrel is the heart of your pistol’s performance; upgrading to a match-quality 416R barrel is one of the most impactful changes you can make.
Easy Installation – Drop-In Upgrade
Swapping to a True Precision barrel is simple:
Field-strip your Sig P365.
Remove the factory barrel.
Drop in the True Precision Fuse 4.30" 9mm barrel.
Reassemble and function check.
No fitting, no special tools—just install, test, and go shoot. For most users, it’s one of the easiest ways to noticeably enhance performance.
Ideal for Optic-Equipped & Custom P365 Builds
If you’re running a red dot or have a custom slide on your P365, a precision barrel will help you take full advantage of that setup:
Tighter lockup and better consistency help you capitalize on the finer aiming point of a micro red dot.
The extended length pairs well with compensators or threaded adapters (depending on specific model design), turning your micro pistol into a controllable, flat-shooting platform.
Makes an excellent centerpiece for a carry-comp build, match-ready subcompact, or high-end EDC.
Key Specs – True Precision Fuse 9mm Barrel for Sig P365
Manufacturer: True Precision, Inc.
Model: Fuse 9mm Barrel for Sig P365
Part Number: TPP365FBXT
UPC: 719104541998
Caliber: 9mm Luger
Barrel Length: 4.30" (extended)
Material: 416R stainless steel
Fitment: Sig Sauer P365 9mm pistols (drop-in, non-threaded extended profile)
Intended Use: Concealed carry, performance upgrade, range use, training, and custom builds
These specs make it easy to confirm you’re selecting the correct True Precision Fuse barrel for your P365.
Why Choose the True Precision Fuse 9mm P365 Barrel?
You should consider this barrel if you:
Own a Sig Sauer P365 and want a match-grade 416R stainless barrel for improved accuracy and durability
Prefer an extended 4.30" length that offers style, extra sight radius, and added performance
Are building a custom P365 with upgraded sights, slide, or optics and want a barrel that matches the quality
Want a drop-in solution that doesn’t require gunsmithing but still provides a noticeable performance upgrade
For serious concealed carriers, competitive shooters, and custom pistol enthusiasts, the True Precision Fuse 9mm Fits Sig P365 4.30" 416R Stainless Steel Barrel (TPP365FBXT / 719104541998) is a smart, high-quality upgrade that brings match-grade precision and premium materials to one of the most popular micro-compact pistols on the market.
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