SIG Sauer P320-M18 9mm Compact, Coyote Tan, 3.9 in Barrel, Ambi Manual Safety, 21+1
This P320-M18 stands out for its M18 configuration with a coyote-tan slide and grip module, a compact 3.9 in barrel, and an ambidextrous manual thumb safety. It includes two 21-round and one 17-round SIG factory steel magazines, and features the modular, serialized FCU visible through the frame window. Marked NEWINGTON, NH, USA, it delivers the P320-M18 feature set in a clean, well-kept example.
Condition
Overall Condition: Very good condition, showing only light, superficial signs of prior handling or use.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: There are a few small scratches and minor blemishes on exterior surfaces from light handling.
What’s Included
- SIG Sauer P320-M18 9mm pistol (coyote tan)
- 2 SIG Sauer factory steel P320 21-round magazines
- 1 SIG Sauer factory steel P320 17-round magazine
The P320-M18 configuration brings a compact 3.9 in barrel, striker-fired operation, and an ambidextrous manual thumb safety in a package designed for daily carry and duty use. The modular, serialized fire control unit (FCU) is visible through the frame window, underscoring the platform’s adaptable design.
The slide and grip module wear a uniform coyote-tan finish with contrasting dark controls. The slide is rollmarked "SIG SAUER P320 M18" and cut with front and rear diagonal serrations for confident purchase. The frame is marked NEWINGTON, NH, USA, reflecting its U.S. manufacture.
Sight geometry is straightforward and durable, with a fixed front post and a fixed rear notch that sits on a separate top-plate. Both sights are dovetailed, and the rear assembly’s top-plate design is a notable M18 detail.
A three-slot Picatinny/M1913 accessory rail is integrated into the dust cover. Capacity is listed at 21+1, and this pistol ships with two 21-round and one 17-round SIG Sauer factory steel P320 magazines to support that setup.