SIG Sauer P320 Pro XSeries Full-Size 9mm — Agency Vault LE Allocation, 4.7" Barrel, Tritium Sights, 17+1
This rare P320 Pro XSeries Full-Size comes straight from SIG Sauer’s Agency Vault law-enforcement program, making civilian examples hard to find. It combines the modular P320 fire-control unit with a Nitron-finished PRO slide that is optic-ready and fitted with day/night tritium sights. A flat-faced XSeries trigger, flared mag-well funnel, and three 17-round magazines round out a package that mirrors the performance standards of U.S. service pistols while remaining adaptable to multiple calibers and grip sizes.
Condition
Overall Condition: As-new condition with no signs of prior handling beyond what’s typical from inspection.
Bore Condition: Excellent – Clean, mirror finish, sharp lands and grooves.
Specific Condition Notes: The pistol shows only minimal evidence of factory test firing and routine inspection handling; no holster wear or finish loss is present.
What’s Included
- SIG Sauer factory hard case (gray polymer)
- SIG Sauer P320 operator’s manual
- Three 17-round steel magazines with orange followers
- SIG XSeries polymer flared mag-well funnel (loose, not installed)
- Orange plastic chamber safety flag
Built around SIG’s serialized, stainless-steel fire-control unit (FCU), this pistol lets you swap grip modules, slides, and calibers without another FFL transfer, giving owners exceptional flexibility.
The PRO slide wears SIG’s durable Nitron matte black finish and includes front and rear cocking serrations plus a factory optic cut that accepts ROMEO1 PRO, ROMEO2, and Leupold DeltaPoint Pro footprints. Suppressor-height sights are not required—factory tritium XRAY3 day/night sights co-witness through most micro-red-dot optics.
The full-size XSeries grip module features an undercut trigger guard, aggressive texturing, and compatibility with SIG’s removable mag-well funnel and internal grip-weight system for tailored balance and faster reloads.
A flat-faced, skeletonized trigger delivers a straight-rear press and short reset, complementing the striker-fired action’s clean break. Coupled with a 4.7" carbon-steel barrel, the P320 Pro XSeries offers duty-ready accuracy and controllability.
Originally distributed only to police and government agencies, this Agency Vault allocation elevates collectibility while retaining full factory support and parts commonality with standard P320 models.