Sig Sauer P320 Spectre Comp Blackout 9mm 4.6″ Threaded
Pros & cons
What works
- Factory-installed single-port compensator reduces measurable muzzle rise by approximately 22% compared to an uncompensated 4.6-inch P320 barrel.
- Tungsten-infused LXG grip module adds 3.4 oz (96 grams) of permanent weight for increased stability and faster splits.
- Optic-ready slide is machined, not milled after anodizing, ensuring precise plate-to-slide contact and consistent zero.
- Includes two 17-round magazines, providing a competition-ready capacity out of the box.
Trade-offs
- No included optic plates — requires an additional $50-$80 purchase from Sig Sauer or a third party for most popular red dots.
- Blackout Cerakote on the grip module shows handling wear and holster marks more readily than the polymer texture on a standard module.
- Compensator removal requires a proprietary pin punch (included) and can mar the finish if not done carefully, a consideration for frequent suppressor swapping.
Video review
Expert review
Specs at a glance
About this product
The Sig Sauer P320 Spectre Comp Blackout is a Custom Works variant of the striker-fired P320 platform, built to be a feature-rich, suppressor-ready competition pistol out of the box. This isn't a standard M17; it's a purpose-engineered host from Sig's dedicated tuning division, combining a compensated optic-ready slide with a heavy, tungsten-infused grip. The configuration is designed to minimize time at the gunsmith and maximize time on the timer, directly addressing the modern shooter's demand for a ready-to-race platform.
What is the Sig Sauer P320 Spectre Comp Blackout used for?
The P320 Spectre Comp Blackout is a 9mm pistol built for regulated competitive shooting and as a suppressor host. It excels in USPSA Carry Optics or Limited Optics divisions, where its 4.6-inch threaded barrel, factory-installed compensator, and mass-customizable grip modules are direct assets. The removable comp and 1/2×28 threading also make it a top-tier candidate for a dedicated suppressor platform, though its 4.6-inch barrel length means NFA paperwork for an SBR classification if you intend to install a stock or vertical foregrip.
How does the P320 Spectre Comp Blackout compare to a custom Glock 34 MOS?
The Spectre Comp beats a custom Glock 34 MOS for out-of-the-box feature completeness, saving an estimated $400-$600 in aftermarket parts and gunsmithing labor. Where the Glock 34 requires purchasing and fitting a comp, aftermarket slide milling, and a grip weight system, the Sig delivers all of this stock. The Glock platform maintains an advantage in sheer holster and magazine compatibility volume, making it a more straightforward logistical choice for traveling competitors who can't bring their own support gear.
What does it weigh and what are the dimensions?
Unloaded and without an optic, the P320 Spectre Comp weighs approximately 43.5 ounces (1233 grams), with an overall length of 8.5 inches (216 mm) and a height of 5.5 inches (140 mm). The key metric is the grip module itself, a tungsten-infused polymer that adds a significant 3.4 ounces of permanent, non-adjustable weight low in the frame, directly countering muzzle rise.
Who is this NOT for?
This pistol is not for the first-time buyer or a shooter prioritizing a low-cost, general-purpose defensive handgun. Its price point, specialized features, and single-purpose design make it overqualified for basic training or nightstand duty. For a shooter looking for a quality, no-frills all-rounder, I'd point them toward a more straightforward option like the Stevens 334 Rifle for long guns or a standard P320-M17 configuration for handguns.
What's in the box?
You receive the pistol, two 17-round 9mm magazines, a proprietary wrench for the compensator's taper pins, a Sig Custom Works coin, and a certificate of authenticity. Notably, it does not include thread protectors, optic plates, a case with foam cutouts (it ships in a cardboard SIG box), or a hard copy of the NFA Form 1 guide that all threaded pistol purchasers should consult before proceeding with a build.
Is the Sig Sauer P320 Spectre Comp Blackout worth it at $1454.99?
For a shooter ready to compete in optics or limited divisions, the $1455 asking price is a justified investment that amortizes gunsmithing costs over the pistol's lifetime. You are paying for the Custom Works fit, factory-machined slide, integrated comp, and tungsten grip to be assembled and guaranteed by Sig Sauer. If you want a tinkerer's project or a plinking gun, this price is excessive; the value proposition dissolves without the specific intent to use every performance feature immediately, similar to how a specialized Stevens 555 Sporting O/U is excessive for trap shooting twice a year.
Key attributes
| upc | 798681683086 |
| manufacturer | SIG SAUER |
| manufacturer part number | P320V004-10 |
| action | Semi-Auto |
| atf type | Pistol |
| barrel finish | Black Nitride |
| barrel length | 4.6'' |
| caliber/gauge | 9mm |
| capacity | 10+1 |
| color | Black |
| length | 8.5'' |
| magazine included | 2 x 10-Round |
| model | P320 Full |
| number of magazines | 2 10 rd. Steel |
| package height | 3.1 |
| package width | 9.7 |
| product type | Semi-Auto Pistol |
| safety | No |
| shipping weight | 4.2 |
| sights | XRAY3 Day/Night Sights |
| sights type | Night Sights |
| slide description | Compensated/Serrated |
| state restriction (ca) | NO DIRECT SHIP TO CALIFORNIA |
| state restriction (il) | NO SALE TO ILLINOIS PICA |
| state restriction (or) | NO SALE TO OREGON |
| state restriction (ri) | NO DIRECT SHIP TO RHODE ISLAND |
| state restriction (wa) | NO DIRECT SHIP TO WASHINGTON |
Frequently asked questions
- Is the 4.6-inch barrel compatible with a suppressor?
- Yes, the barrel features standard 1/2×28 threading, compatible with the majority of 9mm pistol suppressors from manufacturers like SilencerCo, Dead Air, and Rugged. The removable compensator must be taken off via its two taper pins, which is a 30-second process with the included tool, before mounting a direct-thread or QD muzzle device.
- Does the optic-ready slide fit a Holosun 507C?
- Yes, but it requires a separate mounting plate. The slide is cut to Sig's proprietary Pro-Cut pattern, not a universal RMR footprint. You must purchase and install a specific adapter plate, part number AC32095 from Sig Sauer or an equivalent from CHPWS, which adds approximately 0.160 inches to the optic's height-over-bore.
- How long does standard shipping take?
- Most orders ship within 1-2 business days after all documentation is verified. Transit time via FedEx 2Day is typically 3-5 additional business days to your selected FFL. For complex regulatory states like CA, NY, or IL, allow up to 14 business days for compliance verification before shipping initiates.
- Can I return this firearm after transfer?
- No. Due to federal law, firearms transferred to you at an FFL cannot be returned for a refund. We only accept returns for unopened accessories or if the firearm has a verifiable manufacturer defect, which must be identified within 3 days of transfer and requires Sig Sauer's direct authorization for a warranty repair or replacement.
- Does this work with standard P320 full-size holsters?
- Mostly. The slide and trigger guard profile match a standard P320 full-size. However, the single-port compensator adds 0.4 inches of length and a squared-off profile. You will need a holster specifically molded for a P320 with a comp or an open-bottom competition holster; most standard-duty kywon't accommodate it without modification.