The Sig Sauer P320 ROMEO-X Pro Slide (brand part number 8901570) is a factory RXP X-Series stainless steel slide assembly in 9mm Luger with a low-profile black finish, built by Sig Sauer around the ROMEO-X Pro reflex optic. The optic’s slim housing lets shooters keep the included standard-height iron sights for a clean co-witness, eliminating the need for tall suppressor-height sights. This slide assembly fits Full, Carry, and Compact size grip modules across both X-Series and non-X-Series P320 frames, and it is built to accommodate a 4.7-inch barrel, which is sold separately.

Key Specifications

• Built for the Sig Sauer P320 pistol platform as an RXP X-Series slide assembly.
• Chambered in 9mm Luger, the P320’s most common caliber.
• Finished in black for a clean, low-glare look.
• Constructed from stainless steel for long-term durability.
• Cut with serrations for a secure grip during racking.
• Comes with a factory ROMEO-X Pro optic already installed.
• Uses Xray3 sights for a standard-height co-witness with the optic.
• Fits Full, Carry, and Compact size grip modules (X-Series and non-X-Series).
• Accommodates a 4.7-inch barrel, sold separately.

Frequently Asked Questions

Is the barrel included? No, this is a slide assembly only; the 4.7-inch barrel it is built for is sold separately.

Will this work with a non-X-Series grip module? Yes, it fits Full, Carry, and Compact grip modules in both X-Series and non-X-Series versions.

Buy the Sig Sauer P320 ROMEO-X Pro Slide

Upgrade your P320 with a factory optic-ready slide built around a low-profile reflex sight. Order this handgun slide from our Lubbock, Texas gun shop for fast, insured shipping.