Sig Sauer P320 M18 9mm, 3.9-inch, Coyote Tan, Wilson Combat Grip, 21+1
This Sig Sauer P320 M18 pairs the factory compact 3.9-inch coyote-tan M18 slide and stainless barrel with the P320’s modular stainless-steel FCU, visible through the grip window. It has been upgraded with a tan Wilson Combat P320 grip module featuring aggressive starburst texturing. The slide includes front and rear serrations, a rear optic cut with cover plate, and iron sights. It ships with three steel magazines and the original SIG factory grip module.
Notable features include the 1913 four-slot accessory rail on the dust cover, maximum stated capacity of 21+1, and magazines marked “Made in Italy” in both 17- and 21-round configurations. The original grip was replaced with the Wilson Combat module, and the M18 slide and barrel are installed.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: Light wear and small scuffs are present from prior handling.
What’s Included
- Wilson Combat P320 grip module with starburst texture (installed)
- SIG Sauer P320 factory grip module (original; molded SIG SAUER / NEWINGTON, NH, USA)
- SIG Sauer factory hard case
- 2x 21-round steel P320 magazines marked "MADE IN ITALY" (extended base-pad type)
- 1x 17-round steel P320 magazine marked "MADE IN ITALY"
The factory M18 compact slide and stainless barrel are installed, providing the coyote-tan finish, 3.9-inch length, and M18 sighting system with factory sights and a removable optics cover plate. The rear optic cut is covered by a factory plate when not in use.
The upgraded Wilson Combat P320 grip module in tan adds the brand’s starburst texture for secure traction. The P320’s modular serialized FCU is visible through the grip window, and the dust cover integrates a 1913 four-slot accessory rail for lights or lasers.
This 9mm configuration is striker-fired and maintains the P320’s familiar controls and handling. Slide features include front and rear serrations for positive manipulation, with iron sights installed.
Three steel magazines are included: two 21-round extended-base types and one 17-round, all marked “Made in Italy.” Maximum stated capacity is 21+1. The original SIG factory grip module and a SIG Sauer hard case are also included.