Sig Sauer P320 .357 SIG 4.7″ Non-Threaded Steel Barrel

This is a factory replacement barrel for full-size Sig Sauer pistols, chambered in .357 SIG. The barrel measures 4.7 inches in length and is supplied as a non-threaded unit. It is described by the manufacturer as steel and factory heat-treated for toughness and durability, and is listed to fit Sig P250 and P320 full-size pistols.

Key Specifications

• Chambered in .357 SIG.
• The barrel measures 4.7 inches in length.
• Designed to fit Sig Sauer P320 and P250 full-size pistols.
• Construction material is listed as steel.
• Delivered as a non-threaded barrel.
• Manufacturer indicates the barrel is factory heat-treated for toughness.
• Sold as a replacement barrel for full-size service pistols.
• Listed without an LCI as NO-LCI in product text.

As a factory replacement part, this Sig Sauer barrel provides a direct-fit option for users maintaining or restoring full-size P320/P250 pistols. Its 4.7″ length and steel construction make it suitable for standard service and duty applications where factory-spec components are required. Choose this barrel when you need a like-for-like replacement built to the manufacturer’s heat-treatment and fitment standards.