SIG Sauer P320 X-Series Professional 9mm — Agency Vault Law-Enforcement Overrun, 4.7" Barrel, 17-Round
This P320 X-Series Professional comes directly from SIG Sauer’s Agency Vault law-enforcement allocation and was originally produced for police and government contracts. Rarely released to the civilian market, it pairs the P320’s modular fire-control unit with a full-size X-Series grip, a flat skeletonized X-trigger, and a PRO-footprint optic-cut slide finished in matte black Nitron.
Condition
Overall Condition: As-new — no signs of prior handling beyond standard inspection.
Bore Condition: Excellent — clean, mirror finish with sharp lands and grooves.
Specific Condition Notes: Presents as rarely used apart from the factory test fire.
What’s Included
- SIG Sauer factory hard plastic pistol case
- 3 × 17-round SIG Sauer steel magazines
- Orange plastic chamber safety flag
The Agency Vault lineage sets this pistol apart from standard commercial P320s. Built for duty use, it retains the same modular, removable fire-control unit that allows quick caliber or grip module changes without an FFL transfer.
The full-size X-Series grip module features an extended beavertail, aggressive texturing, and an under-cut trigger guard that promotes a high, controllable hand position. A four-slot MIL-STD-1913 accessory rail is molded into the dustcover for mounting lights or lasers.
A carbon-steel 4.7" barrel sits inside a Nitron-finished stainless-steel slide that carries both forward and rear serrations for easy manipulation. The slide is cut for SIG’s PRO optic footprint, ready to accept SIG Romeo2, Romeo1T, or Leupold DeltaPoint Pro red-dot sights without further machining.
Day/night SIG XRAY3 tritium sights come installed for instant visibility in any light. The flat-faced, skeletonized X-trigger delivers a short, crisp reset, complementing the striker-fired action for fast follow-up shots.
Made in the USA, this overrun variant offers collectors and shooters a factory-fresh opportunity to own a configuration normally reserved for law-enforcement contracts.