SIG Sauer P320 Full-Size 9mm, 4.7 in Barrel, Optic-Cut Slide, ROMEO-X Installed, Flat Trigger, 3x 17-Rd Mags
This full-size SIG Sauer P320 stands out with a factory 4.7-inch barrel, a black Nitron-type slide featuring an optic cut, and a SIG Sauer ROMEO-X micro reflex sight installed. It includes three 17-round steel magazines and a flat-faced trigger. The modular FCU architecture, ambidextrous slide catch levers, and polymer frame with accessory rail round out a well-equipped 9mm made in the USA.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: The pistol is in great shape with mild wear visible on close inspection.
What's Included
- SIG Sauer ROMEO-X micro reflex sight (installed)
- Direct-mount installation to slide optic cut (no adapter plate required)
- Three 17-round steel magazines with orange followers
- SIG Sauer factory hard case
- SIG Sauer P320 owner's manual
- Adhesive grip tape applied to the grip module (installed)
The P320 Full-Size configuration pairs a 4.7-inch barrel with 17+1 capacity in 9mm Luger. It is striker-fired and features a flat-faced trigger. The modular FCU architecture and ambidextrous slide catch levers provide a modern control layout within a durable polymer frame with accessory rail.
The slide wears a black Nitron-type finish and is cut for an optic, with both front and rear serrations. Factory markings include "SIG SAUER P320" on the slide, "9x19" on the ejection port, and "NEWINGTON, NH, USA" on the right side.
A SIG Sauer ROMEO-X micro reflex sight is installed directly to the slide’s optic cut (no adapter plate), with the optic’s screws threading into the slide. The front sight is a square post with a green-dotted insert. Rear sight configuration remains usable with the installed optic.
Adhesive grip tape is applied to the grip surfaces for added traction. Three 17-round steel magazines with orange followers, the factory hard case, and the P320 owner's manual are included.

