SIG Custom Works P320 Spectre Comp 9mm Full-Size, 4.6 in Threaded Barrel, Single-Port Compensator, 20+1
This SIG Custom Works P320 Spectre Comp stands out with its slide-mounted single-port compensator, tall 3-dot sights with a bright green front dot, and an optics-cut slide with cover plate. It features a 4.6 in extended threaded barrel with a 1/2x28 pattern, a flat skeletonized trigger, and the modular P320 design with a serialized FCU. The full-size XSeries-style grip module includes a removable flared metal magwell, and the pistol comes with one 20-round magazine and a hard case.
Condition
Overall Condition: Good condition, showing some signs of prior use and handling.
Bore Overall Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in solid functional shape. There are scratches and blemishes present. The bore is clean and shiny. There is carbon buildup inside the compensator.
What’s Included
- SIG Custom Works P320 Spectre Comp 9mm pistol
- 1x 20-round steel magazine with extended base pad (marked "MADE IN USA")
- Condition 1 hard pistol case with egg-crate foam
The Spectre Comp configuration uses a slide-mounted, single-port compensator secured by two top screws, helping control muzzle rise. The compensator carries the bright green front sight, paired with a tall 3-dot setup and a serrated rear blade mounted on the optics plate.
The 4.6 in barrel is extended and threaded 1/2x28, with markings on the hood reading "9mm x 19 1/2-28." This striker-fired build uses a flat, skeletonized trigger shoe for a consistent press, and retains a left-side magazine release with an ambidextrous slide catch.
The slide features aggressive front and rear serrations along with top and side lightening windows. It is optics cut and ships with a cover plate, with the rear sight mounted on the optics plate. Slide markings include "SIG SAUER P320" and "SIG Custom Works."
The full-size XSeries-style grip module includes an extended beavertail, a high undercut, and a removable flared metal magwell. The design remains fully modular with the P320’s serialized FCU and metal serial plate, and it integrates a full-length Picatinny/M1913 accessory rail. Capacity is 20+1, and one steel 20-round magazine with an extended base pad is included.
Manufactured in Newington, NH, USA, this Spectre Comp brings Custom Works fit and finish together with the P320’s proven modular architecture and feature-rich slide and grip configuration.