Sig Sauer® P365-FUSE Factory 9mm Threaded Barrel – 4.9" Length – 1/2x28 TPI – Nitron® Finish – LCI Cutout – 8902025
The Sig Sauer® P365-FUSE Factory 9mm Threaded Barrel (8902025) is a premium, factory-original drop-in performance upgrade engineered specifically to adapt the full-size shootability of the P365-FUSE platform for suppressors and compensators. While aftermarket utility barrels frequently suffer from variable lug tolerances, inconsistent lockup tracking, and steep feed-ramp profiling that can cause frustrating failure-to-feed (FTF) jams with heavy defensive hollow points, this authentic Sig Sauer component eliminates those operational liabilities entirely. This 4.9-inch threaded barrel (798681734634) serves as the gold-standard assurance policy for your micro-compact crossover, providing clean mechanical cycling and match-grade accuracy under high-volume firing strings.
Precision-machined from high-grade, premium carbon steel and specially heat-treated for extreme toughness and surface elasticity, the 8902025 core is built to withstand high abrasive wear and violent slide impact velocities. The barrel is encased in Sig's signature Nitron® (matte black nitride) finish, a deep chemical armor that seals out environmental moisture, skin acids, and abrasive copper-cleaning solvents while drastically minimizing surface friction. Ground with a standard 1/2x28 RH thread pitch, it accepts the industry's most popular muzzle attachments, while the integrated **Loaded Chamber Indicator (LCI) witness hole** aligns perfectly with your factory slide to allow instantaneous, visual ammunition verification. Complete with a knurled factory thread protector cap to shield the muzzle crown when not running muzzle devices, this turn-key upgrade is the definitive choice for personal defense setups, suppressed range trainers, and tactical configurations.
Includes: (1) Sig Sauer P365-FUSE 4.9" 9mm Threaded Barrel with Factory LCI Witness Slot and (1) Knurled Matte Black Thread Protector Cap.
*Compatibility & Slide Note: This factory barrel is custom-dimensioned EXCLUSIVELY for the standard, uncompensated Sig Sauer P365-FUSE (4.3" slide assembly). It is NOT compatible with shorter P365, P365X, P365-XL, or XMACRO slide assemblies, nor will it drop into the integrated expansion chamber configuration of the P365-FUSE COMP slides.
Key Features
- Optimized 4.9" Suppressor Length: Adds precise external clearance beyond the front of the FUSE slide assembly to mount modern suppressors and micro-compensators safely.
- Precision 1/2x28 RH Threading: Clean, factory-cut thread tracks guarantee absolute concentric alignment, protecting your muzzle layout from dangerous baffle strikes.
- Factory Loaded Chamber Indicator: Retains the authentic OEM LCI witness cut-out, preserving complete situational safety checks without forcing modification of your slide assembly parts.
- Friction-Reducing Nitron Coating: Deep black nitride hardcoat resists aggressive surface scuffing and carbon scaling while maintaining excellent internal micro-smooth tracking.
- Heat-Treated Structural Build: Specially treated carbon-steel core stands up to thousands of high-pressure tactical training strings and premium defensive handloads.
- Genuine New Hampshire OEM Quality: Built on official factory tooling to match standard dimensional lockup tolerances, preserving your weapon's mechanical warranty.
Product Specifications
- Brand: Sig Sauer®
- Product Line: Factory OEM Replacement Parts
- Model Name: P365-FUSE 9mm Threaded Barrel, LCI
- SKU / MPN: 8902025 (Alternative Part Identifier: BBL-P365LS-9-49-TB-1228-LCI)
- Firearm Model Compatibility: Sig Sauer P365-FUSE (Standard 4.3" Slide Models Only)
- Cartridge Caliber Accommodation: 9x19mm Parabellum / 9mm Luger
- Total Longitudinal Length: 4.90 Inches (124.5 mm)
- Thread Pitch Profile: 1/2"x28 TPI Right Hand (RH)
- Chassis Core Material: Premium Specially Heat-Treated Carbon Steel
- Finish Treatment: Advanced Nitron® Matte Black Nitride Coating
- Loaded Chamber Indicator Cut: Yes (Factory Witness Window Hole)
- Muzzle Finish Cap: Knurled Steel Thread Protector Included
- Feed Ramp Architecture: Precision-Polished Integrated Feed Ramp
- Country of Origin: Proudly Made in the USA
- Product Net Weight: ~3.40 oz (96.4 g)
- UPC: 798681734634
