The SilencerCo Threaded Barrel for the Sig Sauer P320 Full-Size (brand part number AC2413) is a direct-fit 9mm replacement barrel for shooters adding a pistol suppressor to their P320. It fits the P320 Full-Size, P320 RX Full-Size, and P320 Nitron Full-Size variants. Every pistol suppressor needs a threaded host barrel, and SilencerCo machines this one from 416R stainless steel and finishes it in black nitride for durability. The barrel measures 5.46 inches, is cut 1/2×28 to accept standard 9mm suppressor mounts, and ships with a thread protector. A piston is required separately to complete a suppressor setup.

Key Specifications

• Fits the Sig Sauer P320 Full-Size, P320 RX Full-Size, and P320 Nitron Full-Size.
• Chambered in 9mm Luger.
• Threaded 1/2×28 for standard 9mm suppressor mounts.
• Measures 5.46 inches.
• Rifled with a 1:10-inch twist rate.
• Machined from 416R stainless steel for corrosion resistance.
• Finished in black nitride for a durable, low-glare coating.
• Ships with a thread protector to cap the threads when unsuppressed.
• Requires a separate piston to complete a suppressor host setup.

Frequently Asked Questions

Which P320 variants fit this barrel? The P320 Full-Size, P320 RX Full-Size, and P320 Nitron Full-Size.

What thread pattern does it use? 1/2×28, the standard for 9mm pistol suppressors.

Does it come with a piston? No, a piston is sold separately to complete your suppressor host setup.

Buy the SilencerCo 9mm Threaded Barrel for Sig P320 Full-Size

Get your P320 ready to run suppressed with a factory-direct threaded barrel. Order it from our SilencerCo lineup, part of our handgun barrels selection, at our Lubbock, Texas gun shop for fast, direct shipping.