Rival Arms Spiral Fluted Stainless Steel Barrel for Sig P320 Full Size 9mm Luger

The Rival Arms Spiral Fluted Stainless Steel Barrel for Sig P320 Full Size 9mm Luger is a match-grade replacement barrel built for shooters who want to tighten their groups and extend barrel life. If you run your P320 hard—competition, training, or duty—a quality aftermarket barrel can unlock real accuracy gains and handle the wear that comes with high volume shooting. This one is CNC-machined from 4340H steel, precision-polished, and finished with a premium PVD coating that resists corrosion and keeps the bore in fighting shape for years.

The spiral fluted design reduces weight without sacrificing rigidity, and the target-crowned muzzle helps ensure consistent bullet release. Threading follows the 1/2-28 standard, so you can run suppressors, compensators, or other muzzle devices without hunting for adapters. The 1:10 twist and 6-groove rifling profile stabilize 9mm projectiles reliably across the spectrum of common loads. Installation is straightforward—no gunsmith required—making this a weekend upgrade for anyone comfortable swapping a P320 barrel.

Rival Arms hand-inspects every barrel before it ships, and backs the work with a limited lifetime warranty. This is the kind of part that rewards good technique and consistent practice with measurably better results downrange.

Key Features

• Match-grade 4340H steel construction for durability and accuracy
• Spiral fluted design reduces weight while maintaining rigidity
• Premium PVD coating resists wear and corrosion
• 1/2-28 threaded for suppressor and compensator compatibility
• 1:10 twist, 6-groove rifling optimized for 9mm Luger
• Target-crowned muzzle for consistent bullet release
• Hand-inspected and ready to install—no gunsmith required
• Limited lifetime warranty

Specifications

Firearm	Sig Sauer P320 Full Size
Caliber	9mm Luger
Material	4340H Stainless Steel
Finish	PVD Coating
Muzzle Thread	1/2-28
Twist Rate	1:10
Rifling	6 Groove
Design	Spiral Fluted
Muzzle Crown	Target Crowned

Frequently Asked Questions

Will this barrel fit my Sig P320 Full Size?

Yes—this barrel is built specifically for the P320 Full Size in 9mm. Installation requires no gunsmith; it's a straightforward swap if you're comfortable handling your firearm.

Can I attach a suppressor to this barrel?

Yes. The barrel is threaded 1/2-28, the standard for 9mm suppressors and muzzle devices, so you can add a suppressor, compensator, or other threaded accessory without needing an adapter.

What finish does this barrel have?

The barrel is finished with a premium PVD (Physical Vapor Deposition) coating, which creates a durable barrier against corrosion and wear. It's precision-polished and hand-inspected before shipment.

What warranty does Rival Arms provide?

Rival Arms backs this barrel with a limited lifetime warranty.