SIG Sauer P320 X-FULL X-Series 9mm, 4.7 in Barrel, Tritium Night Sights, Optics-Ready, 21+1, Three Magazines (ROMEO X PRO Bundle SKU — Optic Not Included)
This SIG Sauer P320 X-FULL from the X-Series is a full-size, striker-fired 9mm configured for modern performance. It combines a 4.7 in barrel with a modular, serialized FCU chassis and an X-Series grip module. This example is the ROMEO X PRO bundle (SKU 320XF-9-BXR3-RXX); the optic has been removed and is not included. The pistol ships optics-ready with the factory cover plate installed, and includes three steel magazines including an extended 21-round option. Tritium night sights and ambidextrous slide catch levers round out a feature-rich setup made in the USA.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Specific Condition Notes: There is mild wear and a few scuffs on the slide. Overall, the pistol remains in clean shape.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
What’s Included
- SIG Sauer factory hard case with factory label (SKU 320XF-9-BXR3-RXX, ROMEO X PRO bundle; optic removed/not included)
- Three P320-pattern steel magazines: one 21-round extended magazine and two 17-round magazines
- Factory optics cover plate installed (no optic included)
The X-FULL configuration delivers the full-size slide and 4.7 in barrel in the X-Series format, offering a balanced sight radius of 6.6 in and a controllable grip profile. The modular, serialized FCU chassis provides flexibility for future configuration within the P320 ecosystem.
The X-Series grip module features an extended beavertail and a high undercut for a secure, high purchase. Controls include ambidextrous slide catch levers and a left-side magazine release. A flat-faced, skeletonized trigger supports a straight, consistent press.
The slide is optics-ready with a cover plate installed and includes both front and rear cocking serrations for positive manipulation. The factory 3-dot tritium night sights provide a clear, low-light sight picture aligned to the 6.6 in sight radius.
A 1913/Picatinny accessory rail with four slots is molded into the polymer frame for light or laser mounting. Capacity is 21+1 with the included extended magazine, and the package includes two additional 17-round magazines for versatility at the range or on duty.