SIG Sauer P320 Professional XPro X-Series 9mm Full-Size – Agency Vault Law-Enforcement Release, Optic-Ready, 4.7" Barrel, 17+1
This P320 Professional XPro comes straight from SIG Sauer’s limited Law Enforcement “Agency Vault” allocation, offering civilians a rarely seen duty-grade X-Series pistol with factory optic cut, XRAY3 day/night sights, and SIG’s latest voluntary-upgrade fire-control group. Built in 2024–2025 (serial prefix 58K), it arrives as-new in box with three 17-round magazines and the modular Fire Control Unit that lets you swap calibers and grip modules with ease.
Condition
Overall Condition: As-new condition with no signs of prior handling beyond what’s typical from inspection.
Bore Overall Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent – Sharp lands and grooves.
Specific Condition Notes: This pistol appears to have been fired only for the factory test, with no additional use evident.
What’s Included
- SIG SAUER grey hard pistol case
- Three factory SIG SAUER 17-round steel magazines
The Agency Vault provenance means this XPro was originally produced for police and government contracts, making it tough to find on the commercial market. Collectors and shooters gain access to the same build quality and internal upgrades specified by professional end users.
The PRO slide features forward and rear cocking serrations plus a factory optic cut that accepts SIG ROMEO2, ROMEO1 T, and Leupold DeltaPoint Pro footprints while retaining co-witness XRAY3 iron sights. A black Nitron finish protects the carbon-steel slide from duty wear and corrosion.
SIG’s X-Series grip module offers an extended beavertail, undercut trigger guard, and a MIL-STD-1913 five-slot accessory rail for lights or lasers. The flat-face XPro trigger pairs with the striker-fired action to deliver a consistent break and short reset.
The modular Fire Control Unit is the serialized component, allowing caliber and size conversions within the P320 family. This example carries the latest-generation striker assembly and disconnector from SIG’s voluntary safety upgrade program.
Chambered in 9mm Luger, the full-size 4.7" nitride-finished carbon-steel barrel and 17-round magazines provide a balance of capacity, recoil control, and sight radius suitable for duty or competition roles.