SIG SAUER P320 9mm 5" Black Slide Assembly

The SIG SAUER P320 9mm 5" black slide assembly is a factory OEM replacement or upgrade component for shooters maintaining, customizing, or building out a P320 platform. This optic-ready slide gives you the foundation to assemble or reassemble a complete P320 in 9mm Luger, whether you're refreshing a worn gun, swapping calibers, or putting together a personalized configuration. The 5-inch barrel length strikes a balance between velocity, handling, and capacity—practical for duty, sport shooting, and self-defense applications where the P320's modular system shines.

Built from stainless steel and finished in black, this slide arrives serrated for positive handling and sight mounting, with the optic cuts already milled to accept modern red dot sights. That means less gunsmithing, faster deployment, and the ability to run your preferred glass straight out of the box. Whether you're a P320 enthusiast stacking parts for your next build, a competitor optimizing your race gun, or someone who just needs a factory replacement, this assembly handles the job without compromise.

SIG SAUER's reputation for precision manufacturing shows in fit and finish. As an OEM component, it's held to the same tolerances as a complete factory P320, so you get reliable feeding, smooth cycling, and the durability SIG is known for. Before you assemble or install this slide, make sure you have the appropriate lower receiver and takedown hardware for your configuration, and always follow all federal, state, and local laws governing firearm assembly and possession.

Key Features

• Optic-ready cut for modern red dot sight mounting
• Serrated slide for improved grip and control
• Stainless steel construction with black finish
• 5-inch barrel configuration
• Chambered in 9mm Luger
• Factory OEM SIG SAUER precision

Specifications

Frequently Asked Questions

What P320 receivers and parts are compatible with this slide assembly?

This 5-inch slide assembly is designed for standard P320 modular systems. It will work with P320 lower receivers and fire control groups, but you'll need to confirm your specific lower receiver is compatible with the 5-inch slide configuration. Check with SIG SAUER or consult the P320 manual for your exact lower assembly before assembly.

Is this slide assembly optic-cut for all red dot sights?

The slide comes optic-ready with cuts milled for mounting. Compatibility depends on the specific red dot footprint (Romeo 1 Pro, DeltaPoint Pro, RMR, etc.). Verify your chosen optic's mounting requirements match the SIG SAUER optic cut on this slide.

What do I need to assemble a complete P320 with this slide?

You'll need a compatible P320 lower receiver (fire control group and grip module), appropriate takedown hardware, and a barrel and barrel assembly designed for the 5-inch P320 platform. This slide assembly alone is not a complete firearm.

Can I use this 5-inch slide on a compact P320 frame?

The SIG SAUER P320 system is modular, but the 5-inch slide is engineered for full-size frames. Using it on a compact frame may cause functional or safety issues. Stick with the correct size pairing as specified by SIG SAUER.