The Sig Sauer P320 slide assembly (brand part no. 8900959) is a factory replacement, slide-only unit built for P320 pistols from X-Compact through X-Full size, using the standard 9mm 4.7-inch non-threaded or 5.5-inch threaded barrels. This slide is for 9mm only and is not compatible with .40, .357, or .45 caliber P320s, and it ships without the barrel or recoil assembly. Machined from stainless steel and finished in a durable black Nitron coating, it is optic ready and cut for XRAY3 day/night suppressor-height sights, with compatibility for ROMEO1-PRO, ROMEO2, Delta Point Pro, and RMR footprint optics, the last requiring a sealing plate. A removable optics plate with top-accessible screws rounds out this factory-grade slide swap option.

Key Specifications

• Built for P320 X-Compact through X-Full size pistols.
• Fits standard 9mm 4.7-inch non-threaded or 5.5-inch threaded barrels.
• Chambered for 9mm only, not compatible with .40, .357, or .45 P320s.
• Finished with a durable black Nitron coating.
• Cut for XRAY3 day/night suppressor-height sights.
• Compatible with ROMEO1-PRO, ROMEO2, Delta Point Pro, and RMR footprint optics.
• Ships as a slide-only assembly, without barrel or recoil assembly.
• Features front and rear serrations for confident slide manipulation.
• Machined from stainless steel for long-term durability and corrosion resistance.

Frequently Asked Questions

Does this slide include the barrel and recoil spring? No, this is a slide-only assembly; barrel and recoil assembly are not included.

What calibers is this slide compatible with? 9mm only, not .40, .357, or .45.

Is this slide optic ready? Yes, it accepts ROMEO1-PRO, ROMEO2, Delta Point Pro, and RMR footprint optics.

Buy the Sig Sauer P320 X-Compact/X-Full Slide Assembly

Order this factory Sig Sauer slide from our Lubbock, Texas gun shop, and it will ship as soon as it is ready to send. Browse more handgun parts for your P320.