Rival Arms Precision Drop-In Barrel — Sig P365 — 9mm Luger — 3.10" — Gold PVD Finish — 4340H Steel — Threaded (Model RA20P002E, UPC: 788130031339)
Give your Sig P365 a premium cosmetic and performance upgrade with the Rival Arms Precision Drop-In Barrel (RA20P002E). Machined from high-strength 4340H steel, finished in a striking Gold PVD, and cut with factory threading, this 3.10" 9mm Luger barrel is built to improve accuracy, durability, and accessory flexibility — all while maintaining a true drop-in fit for most standard P365 slides. Ideal for shooters who want a high-quality, suppressor/compensator-ready barrel that looks as good as it shoots.
Precision Materials & Eye-Catching Gold PVD Finish
Rival Arms selects 4340H steel for its balance of toughness and thermal stability — a material that tolerates repeated firing and the heat cycling common to modern carry pistols. The Gold PVD (Physical Vapor Deposition) finish adds a hard, low-friction protective layer that resists wear and corrosion while delivering a premium aesthetic that stands out on custom builds. The combination of robust substrate and protective coating gives you both lasting performance and a showpiece look.
Performance That Matters
Tighter groups: Precision chambering and a true bore deliver improved shot-to-shot consistency versus many factory barrels.
Optimized crown: A careful target crown reduces muzzle disturbance for better accuracy and repeatable point of impact.
Threaded muzzle: Factory-cut threading allows mounting of compensators, thread-on muzzle devices, or suppressors (where legal). Use a thread protector when no device is fitted.
Durable under use: 4340H core plus Gold PVD exterior stands up to routine maintenance and range abuse while keeping a premium appearance.
SEO keywords: Rival Arms drop-in barrel Sig P365, 3.10" gold PVD barrel, threaded P365 barrel, RA20P002E, 4340H P365 barrel.
Compatibility & Fitment
Model: RA20P002E
UPC: 788130031339
Caliber: 9mm Luger (9×19)
Barrel Length: 3.10 inches
Material: 4340H steel
Finish: Gold PVD (protective, low-glare decorative coating)
Threaded: Yes — factory cut (verify pitch & length in product documentation)
Intended Fit: Drop-in replacement for standard Sig P365 slides. Confirm your slide variant (P365, P365X, P365XL, optic cuts or aftermarket slides) before purchase.
Important: While this barrel is designed as a drop-in for standard P365 slides, some aftermarket slides or heavily modified/open-top slides (optic cuts, custom extractors, or non-standard tolerances) may require verification or a quick gunsmith check. Always confirm thread pitch and length with the packaging/spec sheet before attaching muzzle devices.
Installation — Fast & User-Friendly
Rival Arms engineers the RA20P002E as a true drop-in barrel:
Ensure the pistol is clear and unloaded.
Remove the slide assembly from the frame and take out the factory barrel.
Insert the Rival Arms barrel into the slide and reassemble per Sig Sauer instructions.
Perform function checks (slide lock, feeding, and safety checks) before range testing.
No specialized gunsmithing is normally required — but if your slide has aftermarket modifications, a quick check by a qualified armorer is recommended.
Threading & Accessories
The threaded muzzle enables use of compensators, thread-on adapters, or suppressors where legal.
Always verify exact thread pitch and overall thread length from the product documentation or packaging prior to purchasing muzzle devices. Using the wrong pitch can damage threads or devices.
Use a thread protector when no device is installed to protect the threads and preserve accuracy.
Maintenance & Care
Cleaning: Clean the bore and chamber regularly with suitable brushes and solvent. Pay attention to the crown and throat area.
Finish care: PVD is robust but avoid harsh abrasives; wipe the exterior with a microfiber cloth and use mild solvent when needed.
Inspection: Inspect threads, crown, and feed ramp for nicks or wear; replace or re-crown if accuracy declines.
Lubrication: Light lubrication on locking surfaces is recommended; avoid heavy oils that attract fouling in the chamber/barrel interface.
Who Should Buy This Barrel?
Sig P365 owners seeking appearance upgrades without sacrificing function.
Shooters who want a threaded, suppressor/compensator-ready P365 for competition, duty, or home defense (observe legal requirements).
Competitive and precision shooters who want measurable accuracy improvements in a compact carry pistol.
Armorers and custom builders who want a drop-in, high-quality replacement barrel with a premium finish.
Safety & Legal Reminder
Threaded barrels can be used with suppressors or other muzzle devices that are regulated in many jurisdictions. It is the buyer’s responsibility to understand and comply with all applicable federal, state, and local laws before purchasing, installing, or using regulated muzzle devices.
Technical Snapshot
Model / SKU: RA20P002E
UPC: 788130031339
Caliber: 9mm Luger (9×19)
Length: 3.10"
Material: 4340H Steel
Finish: Gold PVD
Threaded: Yes — factory cut (verify pitch/length)
Fitment: Drop-in for standard Sig P365 slides (verify slide variant)
Use Cases: Competition, defensive carry, suppressed/compensated builds, range/training
Final Thoughts
The Rival Arms Precision Drop-In Barrel RA20P002E combines high-quality 4340H construction, a protective Gold PVD finish, and threaded versatility into a compact 3.10" package designed for the Sig P365. It’s a tasteful, functional upgrade for shooters who want improved accuracy, reduced muzzle disturbance, and the option to run threaded devices — all while giving your pistol a standout, premium look. Install, verify, and enjoy a refined shooting experience from one of the most popular micro-compact pistols on the market.
The End
