The True Precision Inc Fuse 9mm Barrel for Sig P365 (TPP365FBXTBL) is a premium, threaded, drop-in upgrade built for shooters who want serious performance and modern style from their P365-FUSE. Precision machined from USA-sourced 416R stainless steel and finished in a tough black nitride, this 4.30" 9mm barrel is designed specifically for the 4.3" Sig Sauer P365-FUSE models, with the accuracy, reliability, and comp/suppressor-ready threading that serious concealed carriers and performance shooters demand. Zanders Sporting Goods+2BattleHawk Armory+2
If you’re looking for a black threaded 9mm barrel for your Sig P365 Fuse with match-grade construction, 1/2x28 threads, and a sleek black nitride finish, the True Precision TPP365FBXTBL (UPC 719104542087) should be at the top of your shortlist. OpticsPlanet+1
Designed for the 4.3" Sig P365-FUSE Platform
This Fuse barrel is purpose-built around the 4.3" P365-FUSE 9mm models:
Fits: Sig Sauer P365-FUSE 4.3" configuration
Also compatible with P365 3.1" and P365XL 3.7" builds using Fuse slide/barrel setups, per True Precision’s Fuse line. True Precision+2GunStuff.shop+2
Drop-in ready – No gunsmithing required for most factory-spec slides
You get a direct replacement that’s tuned for the Fuse platform, giving your carry or competition build a serious accuracy and reliability boost.
416R Stainless Steel with Black Nitride Finish
At its core, the TPP365FBXTBL uses certified 416R stainless steel: Zanders Sporting Goods+1
Known for match-grade accuracy potential and excellent machinability
Provides strong corrosion resistance, ideal for concealed carry guns exposed to sweat and humidity
Precision-cut chamber and rifling for consistent, repeatable groups
It’s then treated with a black nitride finish, giving you: Zanders Sporting Goods+2BattleHawk Armory+2
A deep, low-glare matte black exterior that looks fantastic with OEM or custom slides
Increased surface hardness and wear resistance
A slick surface that helps with smooth cycling and easier cleaning
This combination of 416R stainless + black nitride gives you the durability of a true duty/EDC barrel with the performance of a match component.
Threaded 1/2x28 – Compensator & Suppressor Ready
A key feature of this Fuse barrel is its threaded muzzle, cut to the common 1/2x28 thread pitch: Zanders Sporting Goods+2OpticsPlanet+2
Ready to accept 9mm muzzle devices, including:
Gives you the flexibility to tune recoil, muzzle rise, and overall balance
True Precision includes a high-heat, integral O-ring lock thread protector, helping it stay snug during firing so you’re not constantly re-tightening it at the range. Zanders Sporting Goods
If you’re planning a P365 Fuse carry comp build or future suppressor setup, this barrel is ready from day one.
Extended Length – Approx. 4.95" Overall
While the Fuse barrel is designed around the 4.3" P365-FUSE slide length, its overall threaded length is approximately 4.95": Zanders Sporting Goods
Slightly extends beyond the front of the slide when installed
Provides enough real estate for threads and the included protector
Adds a subtle custom look while remaining compact enough for concealed carry
This extended, threaded profile is ideal for shooters who want a carry-able micro-pistol that’s also comp/suppressor capable.
Proprietary Broach-Cut 6-Groove Rifling & 1:10 Twist
True Precision uses a proprietary broach-cut rifling process with 6 grooves and a 1:10" right-hand twist: Zanders Sporting Goods+2Midwest Gun Works+2
Supports excellent accuracy with most common 9mm bullet weights
Suitable for all ammo types, including cast lead, unlike some polygonal barrels Zanders Sporting Goods
Promotes consistent stabilization and tight group potential from defensive to match loads
The SAAMI-spec 9x19 Luger chamber is cut to support reliable feeding and extraction under real-world conditions. Zanders Sporting Goods+1
Advanced Feed Ramp, Cuts, and Chamfers – Built to Outperform OEM
Across the Fuse line, True Precision emphasizes enhanced geometry over simple “drop-in” barrels:
Advanced cuts and chamfers on the hood and locking areas for smoother lockup and unlock cycles Classic Firearms+2Midwest Gun Works+2
Improved feed ramp design engineered to outperform OEM standards, especially with modern JHP and defensive ammo Classic Firearms+2Riflenetics+2
Built to ensure reliable feeding across various bullet profiles, from range FMJ to wide-mouth hollow points
If your P365-FUSE is a primary carry or defensive pistol, these reliability-focused upgrades matter just as much as raw accuracy.
LCI Note – No Loaded Chamber Indicator Cut
This specific barrel does NOT retain the LCI (Loaded Chamber Indicator) cut-out, as noted by distributors: Zanders Sporting Goods+1
Gives the slide/barrel interface a cleaner, more uniform appearance
Something to be aware of if you’re coming from an OEM barrel that uses an external LCI window
Functionally, it’s a non-issue for most shooters but worth knowing for those who rely on visual LCI features.
Perfect for EDC, Training, and Performance Builds
The True Precision Fuse 9mm Threaded Barrel (Black Nitride) is a strong choice for:
Everyday carry P365-FUSE pistols – Corrosion-resistant, accurate, and built to feed defensive ammo reliably
Performance and competition-style micro builds – Especially when paired with a comp and an optic
High-round-count training guns – 416R stainless and quality rifling hold up well to regular use
Whether you’re building a hard-use EDC gun or a trick P365 Fuse range blaster, this barrel is designed to keep up.
Quick Specs – True Precision Fuse 9mm P365 Threaded Barrel (TPP365FBXTBL)
From current manufacturer and retailer listings: Zanders Sporting Goods+2BattleHawk Armory+2
Manufacturer: True Precision, Inc.
Model: Fuse 9mm Barrel, P365-FUSE
Part Number: TPP365FBXTBL
UPC: 719104542087
Caliber: 9mm Luger (9x19)
Fitment: Sig Sauer P365-FUSE 4.3" models (compatible within Fuse system for P365 and P365XL builds)
Material: USA-sourced certified 416R stainless steel
Finish: Black nitride, black
Barrel Length (nominal): 4.30" (approx. 4.95" overall threaded)
Rifling: Proprietary broach-cut, 6-groove
Twist Rate: 1:10" RH
Chamber: SAAMI-spec 9x19 Luger
Muzzle Threads: 1/2x28
Includes: High-heat integral O-ring lock thread protector
LCI: Does not retain loaded chamber indicator cut
Why Choose the True Precision TPP365FBXTBL for Your P365-FUSE?
You should choose this barrel if you:
Own a Sig Sauer P365-FUSE and want a threaded, black nitride 9mm barrel that’s built for both carry and performance
Plan to run a compensator or suppressor (where legal) using standard 1/2x28 threads
Want match-grade 416R stainless construction, 5-star rifling quality, and improved feed reliability over OEM barrels
Prefer an all-black, stealthy look that pairs perfectly with modern slides and optics
Value a true drop-in upgrade that brings tangible gains in accuracy, reliability, and customization potential
For concealed carriers, performance shooters, and custom-build enthusiasts, the True Precision Inc Fuse 9mm Fits Sig P365 4.30" 416R Stainless Steel, Black Nitride Threaded Barrel (TPP365FBXTBL / 719104542087) is a top-tier barrel that brings American-made precision, rugged durability, and comp-ready versatility to one of the most popular micro-compact platforms on the market.
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