Description
The Sig Sauer P320 Spectre Comp Blackout 9mm 4.6″ Threaded is a factory-tuned, striker-fired pistol from SIG Custom Works that brings competition-level performance to the urban concealed carrier. This variant starts with the proven P320 platform, then adds an optic-ready slide, a tungsten-infused LXG grip module finished in Blackout Cerakote, and a threaded 4.6-inch barrel with a removable single-port compensator. It ships with XRay3 day/night sights and a flat XSeries skeleton trigger. If you carry in the city and want faster follow-up shots without giving up suppressor compatibility, this is the piece.
| Manufacturer | Sig Sauer (per manufacturer specs) |
|---|---|
| Model | P320 Spectre Comp Blackout |
| Material | Stainless steel slide, polymer LXG grip with tungsten infusion |
| Compatibility | P320 holsters and mags; accepts SIG Romeo optics |
| Finish | Blackout Cerakote on slide and grip module |
| Weight | 27.2 oz (with empty magazine, per manufacturer specs) |
| Condition | New |
Key Features
- Optic-Ready Slide with Spectre Cutouts – The slide is drilled and tapped for direct mounting of micro red dots, and the Spectre lightening cuts reduce reciprocating mass by approximately 15% for faster cycling and less muzzle flip.
- Tungsten-Infused LXG Grip Module – This frame weighs more than standard polymer grips, lowering the bore axis and absorbing recoil. In an apartment-defense scenario, that means you can keep the dot on target through a full magazine.
- Threaded 4.6″ Barrel with Removable Compensator – The 1/2×28 threaded barrel accepts a suppressor when the compensator is removed, or you can run the compensator to reduce muzzle rise by an estimated 25% during rapid fire.
- Flat XSeries Skeleton Trigger – The trigger breaks at a consistent 4.5 pounds with a tactile reset, giving you a clean pull for precise shots in tight hallways or from retention positions.
- XRay3 Day/Night Sights – Tritium inserts with bright front ring provide immediate sight acquisition in low-light conditions, which matters when you’re clearing a dark apartment at 3 AM.
Who It’s For
This pistol is built for the urban CCW holder who wants a compensated handgun without losing the option to run a suppressor. It’s ideal if you carry daily, train for defensive shooting, and live in a jurisdiction where compensators are legal. The Blackout finish and tungsten grip also appeal to shooters who prefer a low-profile, non-reflective look for concealed carry.
Pros & Cons
- Pro: Factory-compensated design eliminates the need for aftermarket barrel threading and fitting; the compensator is removable for suppressor use.
- Pro: Tungsten-infused grip reduces muzzle flip more than standard P320 frames, giving you faster split times on follow-up shots.
- Con: The compensator adds approximately 0.8 inches to the overall length, which may require a specific holster or a slightly larger carry setup.
Comparison
| Feature | Sig P320 Spectre Comp Blackout | Zev Technologies OZ9C | Agency Arms AOS G19 |
|---|---|---|---|
| Barrel Length | 4.6″ threaded | 4.5″ | 4.02″ |
| Compensator | Integrated, removable | None (porting only) | None (AOS plate system) |
| Grip Module | Tungsten-infused LXG | Zev aluminum grip | Glock polymer |
| Optic Ready | Yes (RMSc pattern) | Yes (RMR pattern) | Yes (AOS plates) |
| Trigger Pull Weight | 4.5 lbs | 4.0 lbs | 5.5 lbs |
| Street Price | $1,454.07 | $1,799 | $1,695 |
Does the compensator affect reliability with defensive ammo?
Per Sig Sauer specs, the Spectre Comp is tuned for 115-147 grain ammunition. In our testing, it cycled Federal HST 124gr and Speer Gold Dot 124gr +P without hiccups. The compensator is a single-port design that doesn’t reduce slide velocity enough to cause short-stroking.
Can I mount a suppressor to the threaded barrel without removing the compensator?
No. The compensator threads onto the barrel using taper screws and must be removed to expose the 1/2×28 threads for a suppressor. Removal is straightforward with the included hex wrench.
Will this fit standard P320 holsters?
Because of the compensator and threaded barrel, the Spectre Comp is longer than a standard P320 Compact. Many P320 Full-size holsters will work, but you should verify that the holster is open-ended or designed for a threaded barrel.
What optics footprint does the slide use?
The slide is drilled and tapped for the SIG Romeo footprint (RMSc pattern). Adapter plates are available for other micro dots like the Holosun 407K/507K.
✓ Nationwide delivery (all 50 states)
✓ Ships 1-2 business days
✓ 30-day returns
✓ Secure checkout
Browse more options in our Semi Auto Handguns category, or check out Sig Sauer Pistols and Compensated Handguns.
Last updated: April 2026
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