Sig Sauer P320 Full-Size .40 S&W, 4.7 in Barrel, Black Nitron Slide, Modular FCU, 2x 14-Round Mags, Made in USA
This Sig Sauer P320 Full-Size in .40 S&W pairs a 4.7 inch barrel with a stainless-steel slide finished in black Nitron and a black polymer grip module marked "FULL-MEDIUM." It features the P320's modular, serialized stainless-steel FCU chassis, fixed dovetailed 3-dot sights with a rear marked "MH3," and an M1913 Picatinny rail with five slots. Manufactured in the USA, it comes with two 14-round steel magazines, a SIG SAUER factory hard case, and a SIG SAUER-branded polymer holster.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Condition: Good - Clean, well-maintained, minor wear marks.
Bore Rifling: Good Rifling - Intact, well-defined lands and grooves.
Specific Condition Notes: This firearm is in good shape. The slide and frame show minor, superficial scratches and small handling marks. The bore is clean and shiny.
What's Included
- SIG SAUER factory hard case
- 2x 14-round steel magazines (marked "MADE IN ITALY")
- SIG SAUER-branded polymer holster
The P320's modular design centers on a serialized, removable stainless-steel FCU (fire control unit), allowing the core action to reside in a durable internal chassis. This example is configured full-size with a grip module marked "FULL-MEDIUM" and a 4.7 inch barrel chambered in .40 S&W.
Its stainless-steel slide wears a black Nitron finish for corrosion resistance and has front and rear serrations for confident manipulation. An external extractor supports reliable case control, and the pistol runs a striker-fired, short-recoil, locked-breech system.
Sights are fixed, dovetailed 3-dot units, with the rear sight marked "MH3." The dust cover integrates a 5-slot M1913 Picatinny accessory rail for lights or other rail-mounted additions.
The black polymer grip module features a pebbled texture with SIG SAUER logo panels, and no manual thumb safety is observed. Magazines are steel, double-stack units made in Italy; two 14-round mags are included for a 14+1 total capacity. The frame plate is marked EXETER, NH, USA, and this pistol was manufactured in America.




