The Sig Sauer P320 Full-Size Replacement Barrel (brand part no. BBLMODF9) is a factory 9mm Luger barrel machined from black nitride steel for the P320 Full-Size frame. Sig Sauer builds it to a non-threaded muzzle and a 4.7-inch length, matching the factory barrel the Full-Size P320 ships with, so slide cycling and point of impact stay consistent with the pistol’s original geometry. As a genuine Sig Sauer part, it drops into a Full-Size P320 chassis without fitting or gunsmith work, making it a clean option for owners who need a factory-correct replacement barrel or are building out a spare Full-Size upper.

Key Specifications

• Chambered in 9mm Luger.
• Barrel measures 4.7 inches.
• Machined from black nitride steel.
• Non-threaded muzzle.
• Fits the Sig Sauer P320 Full-Size frame.
• Sold as a genuine Sig Sauer factory replacement barrel.

Frequently Asked Questions

What caliber is this barrel chambered in? 9mm Luger.

Is the muzzle threaded? No, it has a non-threaded muzzle.

Which pistol does it fit? The Sig Sauer P320 Full-Size frame.

Buy the Sig Sauer P320 Full-Size Replacement Barrel

Bring your Full-Size P320 back to factory spec with a genuine Sig Sauer barrel. Order it from our Sig Sauer lineup, part of our handgun barrels selection, at our Lubbock, Texas gun shop for fast, direct shipping.