SIG Sauer P320 XFULL Professional “Agency Vault” 9mm Luger – Optic-Ready Law-Enforcement Allocation, 17+1
This rare P320 XFULL Professional comes straight from SIG Sauer’s Agency Vault program—the line built for police and government contracts and only sparingly released to the civilian market. It combines the modular P320 fire-control unit with a factory-milled PRO slide that accepts ROMEO2, ROMEO1T, and Leupold DPP optics without adapter plates. Finished in durable Nitron and fitted with XSeries upgrades throughout, it offers full-size duty capacity, a flat-faced 90°-break trigger, and three 17-round magazines—one more than standard commercial packages.
Condition
Overall Condition: As-new condition with no signs of prior handling beyond what’s typical from inspection.
Bore Condition: Excellent – Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent – Sharp lands and grooves.
Specific Condition Notes: The pistol appears to have seen only factory test-firing and routine inspection handling.
What’s Included
- SIG Sauer factory grey hard case
- Three 17-round SIG Sauer steel magazines with orange followers
- Orange polymer chamber safety flag
Built on SIG’s full-size XSeries polymer grip module, this model features an extended beavertail, high under-cut trigger guard, and a full-length MIL-STD-1913 rail for lights or lasers. The removable, serialized fire-control unit allows caliber or frame swaps while keeping one serialized core.
The PRO slide wears a black Nitron finish and carries forward and rear cocking serrations for positive manipulation. Its direct-mount optic footprint eliminates plates for ROMEO2, ROMEO1T, and Leupold DPP patterns while retaining SIG X-Ray3 tritium night sights on a removable rear plate.
Internally, a 4.7 in. carbon-steel, broach-rifled barrel teams with a striker-fired action tuned for duty reliability. The flat XSeries trigger delivers a short, consistent pull with reduced pre-travel and a crisp 90-degree break.
This W-series SKU (W320F-9-BXR3-PRO) was assembled for law-enforcement contracts, making civilian examples scarce and highly sought after—especially in this virtually untouched condition.