Two titanium cans, one MSRP, and a choice most coverage skips: the smaller Spectre costs more on the street and, by SilencerCo’s own numbers, is a lot louder.
The SilencerCo Spectre 9 is one of the lightest full-auto-rated 9mm suppressors you can buy, an all-titanium can that weighs 3.9 ounces and runs on pistols, subguns, and subsonic .300 Blackout. The real buying question isn’t whether it’s light. It’s which Spectre to buy, because SilencerCo sells two, the Spectre 9 and the shorter Spectre 9K, at the same $879 MSRP. Most buyers assume the smaller one is the upgrade. SilencerCo’s own spec sheets say otherwise: the 9K saves about an inch and three-quarters of an ounce, but on the one host both spec sheets share, SilencerCo lists it nearly 13 dB louder. At Guns.com it also costs about $109 more. The 9K buys you an inch; the 9 buys you the suppression. Below, we cover which version fits which gun, the piston you’ll likely need to buy separately, and when the Omega 9K, Mojave 9, or Obsidian 9 is the better answer.
The verdict: For most buyers, the SilencerCo Spectre 9 is the one to buy. At around $648 on Guns.com against an $879 MSRP, it’s an all-titanium, 3.9-ounce can with meaningfully better published suppression than its shorter sibling. Choose the Spectre 9K only if the last inch on your pistol matters more to you than roughly 10 to 13 dB. The catch for both: SilencerCo’s spec sheets list the pistol piston as sold separately.
Before weighing that verdict, here’s what it rests on.
How We Evaluated It
This review draws on SilencerCo’s Spectre Series product page, the separate Spectre 9 and Spectre 9K spec sheets, and the Spectre 9 field manual, along with current Guns.com pricing, industry reviews, and owner feedback. Competitor specifications come from each manufacturer. Every suppressor here has a published manufacturer spec sheet, which is our minimum bar for inclusion. Sound figures are manufacturer-published and measured under each company’s own conditions, so they aren’t directly comparable across brands, and even within SilencerCo they’re only comparable when the host firearm matches.
Which SilencerCo Spectre 9 Should You Buy?
Most version guides present a ladder where you pay more for the better model. This family doesn’t work that way. Both Spectres carry the same MSRP, and at Guns.com the smaller one costs more, so price sorts nothing here. What actually separates them is length against suppression.
| Version | Price | Length | Weight | .300 BLK Sub (8.5″ AR) | What Changes |
|---|---|---|---|---|---|
| Spectre 9 (SU5422) | ~$648 (MSRP $879) | 4.76″ | 3.9 oz | 132.0 dB | The fuller-size Spectre with more internal volume |
| Spectre 9K (SU5528) | ~$757 (MSRP $879) | 3.69″ | 3.17 oz | 144.9 dB | About 1.07″ shorter and 0.73 oz lighter, with a much higher published sound level |
| Sound figures are from each model’s SilencerCo spec sheet, the only host both sheets share. Prices are approximate Guns.com pricing and change frequently. | |||||
The Spectre 9 is the default. It’s still tiny by 9mm standards at under five inches and under four ounces, and it keeps the suppression. It makes sense on a full-size or compact carry pistol, a pistol-caliber carbine, or a subsonic .300 BLK SBR, and it’s the less expensive of the two at current street pricing.
The Spectre 9K is for the shooter who has already decided that length is the constraint, perhaps a subcompact pistol or a suppressor-ready holster where every fraction of an inch changes how the gun carries. The trade is real: SilencerCo’s own published figures put it well above the Spectre 9, and at Guns.com you pay about $109 more for the privilege.
Watch the Name
The Spectre 9K and the Omega 9K are different suppressors. The Spectre 9K is titanium, 3.69 inches, and 3.17 ounces; the Omega 9K is stainless steel and Cobalt-6, 4.54 inches, and 7.3 ounces. Guns.com lists the Spectre version as “9K Spectre,” which makes the two easy to confuse. Confirm the SKU (SU5528 for the Spectre 9K) before ordering.
If you’re ready to buy, the table above has what you need. The rest of the review is organized below.
In this review
Spectre 9 and 9K Specs at a Glance
These figures come from SilencerCo’s individual spec sheets for each SKU. Both versions share their materials, diameter, caliber ratings, and Alpha mounting system; the differences are length, weight, and published sound levels.
Weight3.9 oz / 3.17 ozSpectre 9 / 9K
Length4.76″ / 3.69″Spectre 9 / 9K
Diameter1.37″Both versions
MaterialsGrade 5 and Grade 9 titanium
9mmFull-auto ratedSubsonic and supersonic
.300 BLKSubs full-autoSupersonic semi-auto only
MountingAlphaDirect thread, ASR, pistons, 3-lug
Ships withAlpha piston mount and toolsPiston sold separately
ConstructionSealed, fully welded
MSRP$879 eachStreet varies by version
According to the spec sheets, each version also ships with an Alpha multi-tool and an Alpha/Echo spanner wrench. SilencerCo’s product page describes the included hardware as the Spectre 9 tool and piston housing, so confirm exactly what’s in the box with your dealer.
What the Spectre Series Does Well
It’s remarkably light for a full-auto-rated 9mm can. At 3.9 ounces, the Spectre 9 weighs a little over half of SilencerCo’s own 7.3-ounce Omega 9K, and less than half of either Dead Air Mojave 9 configuration. On a pistol, weight at the muzzle changes how the gun points and, for some shooters, how reliably it cycles, so shaving ounces here isn’t cosmetic. Shooting Illustrated’s review noted that SilencerCo launched the Spectre 9 touting roughly half the Omega 9K’s weight.
It’s rated for hard use on 9mm. Titanium cans often come with rate-of-fire caveats, but SilencerCo rates the Spectre Series for full-auto fire on both subsonic and supersonic 9mm, and describes the Spectre 9 as one of the few suppressors rated to run on a full-auto Glock. For a civilian shooter on a semi-auto pistol or carbine, that rating mostly means you don’t have to baby it during fast strings.
The rating splits on .300 Blackout. Subsonic .300 BLK is full-auto rated, but supersonic .300 BLK is rated for semi-auto only. If your .300 BLK upper runs supers, keep it on semi.
It fits on nearly every 9mm host through the Alpha system. Both Spectres use SilencerCo’s Alpha pattern, the same mounting family as the Omega 9K. That covers pistons for tilting-barrel pistols, Alpha direct-thread mounts for fixed barrels, Alpha ASR quick-detach, and 3-lug mounts for subguns. SilencerCo also lists its pistons as compatible across the Omega K, Hybrid 46, Osprey, Octane, and Spectre families, so a piston you already own for another SilencerCo can may carry over.
The slim 1.37-inch diameter suits pistols. Both versions share the same diameter, which is narrower than the Omega 9K’s 1.48 inches and the Mojave 9’s 1.405 inches. On a handgun, a slimmer can is less likely to block the sight picture, though sight clearance depends on your sights and optic height, so check your setup before assuming.
SilencerCo Spectre 9
Check current price at Guns.com →Around $648 at Guns.com (MSRP $879)
What SilencerCo’s Sound Numbers Actually Show
The same-price, same-construction framing makes the 9K look like a free downsize. SilencerCo’s own sound figures say it isn’t. Here’s everything SilencerCo publishes for the two versions, with the host rifle or pistol where SilencerCo names one.
| Source | Spectre 9: 9mm | Spectre 9: .300 BLK Sub | Spectre 9K: 9mm | Spectre 9K: .300 BLK Sub |
|---|---|---|---|---|
| Product page | 132.7 dB | 133.3 dB | 142.9 dB | 144.9 dB |
| Spec sheet | 127.6 dB (8″ PCC) | 132.0 dB (8.5″ AR) | 142.9 dB (pistol) | 144.9 dB (8.5″ AR) |
| Field manual | 132.7 dB | 134.7 dB | Not published | Not published |
| Muzzle averages as published by SilencerCo. The product page and manual do not list host firearms. | ||||
The cleanest comparison is .300 BLK subsonic on an 8.5-inch AR, the one host both spec sheets share. There, SilencerCo lists the Spectre 9 at 132.0 dB and the 9K at 144.9 dB, a gap of roughly 13 dB. Using the Spectre 9’s other published .300 BLK figures, the gap is still about 10 to 13 dB. A 10 dB difference is commonly described as sounding roughly twice as loud, so this isn’t a subtle trade.
The 9mm comparison is less tidy, and we won’t pretend otherwise. The Spectre 9’s 127.6 dB spec-sheet figure comes from an 8-inch PCC, while the 9K’s 142.9 dB figure comes from a pistol, and pistols generally measure louder than carbines. So that 15 dB spread overstates the true difference. But even the Spectre 9’s unhosted 132.7 dB figure sits about 10 dB below the 9K.
The Spectre 9’s own documents also disagree with each other on .300 BLK, from 132.0 to 134.7 dB. As with our Scythe Ti review, we show the range rather than picking the flattering number.
What to do with this
If suppression is the reason you’re buying, the Spectre 9 is the clear choice within this family. SilencerCo’s 142.9 dB figure for the 9K on a pistol sits above the 140 dB level often cited as a reference point for impulse-noise hearing risk, so plan on hearing protection with it. And be cautious with retailer copy: we found at least one major retailer listing 9K figures in the low 130s, which don’t match anything SilencerCo publishes for that model.
Known Issues
These are the documented tradeoffs of both Spectre versions, most of them straight from SilencerCo’s own spec sheets and manual.
Spectre Limitations to Know Before Buying
- “It comes ready for my pistol.” Not necessarily. Both spec sheets list the Alpha piston mount as included and the piston itself as sold separately. On a tilting-barrel pistol, you’ll need a piston in your barrel’s thread pitch, about $89 MSRP. The Mojave 9 and Obsidian 9 both include a 1/2×28 piston in the box.
- The 9K is much louder on paper. SilencerCo’s own spec sheets put the 9K about 13 dB above the Spectre 9 on the one host they share. Smaller is the point of the 9K, and suppression is the price.
- Supersonic .300 BLK is semi-auto only. SilencerCo rates both versions for full-auto fire on 9mm and subsonic .300 BLK, but only semi-auto on supersonic .300 BLK. Treat that as a rating limit.
- It’s sealed. Both Spectres are fully welded, so there are no baffles to remove. SilencerCo warns against ammunition with unjacketed lead bullets, because the lead deposits inside can’t be effectively removed.
- The direct-thread mount is for fixed barrels only. SilencerCo states that the Alpha direct-thread mount is not for use on pistols with unlocking or moving barrels, and that using it on a pistol can damage the suppressor. Pistols need the piston setup.
- Alpha isn’t Bravo. The Spectre uses Alpha accessories. If you own a Scythe Ti, Omega 300, or Hybrid 46, their Bravo direct-thread and ASR mounts won’t carry over, although SilencerCo pistons do.
None of these are dealbreakers for the right buyer. The piston is simply a cost to budget, and the sound gap is a reason to buy the Spectre 9 rather than a reason to skip the family. Just remember the thread running through this review: the 9K buys you an inch; the 9 buys you the suppression.
Who Should Skip the Spectre 9
Each of these objections has a better answer, detailed in the next section.
Skip the Spectre If…
- You want the lowest price and don’t mind extra weight → SilencerCo Omega 9K, around $621 in stainless steel and Cobalt-6
- You want one modular can that goes long for maximum suppression on a PCC → Dead Air Mojave 9, with a piston included
- You want to take it apart and clean it, backed by an unconditional warranty → Rugged Obsidian 9, modular and belt-fed rated
- You also shoot .45 ACP or want one can for pistols and rifles → our SilencerCo Hybrid 46 review
The Alternatives in Detail
Three alternatives, three different objections. None of them beats the Spectre on weight. Each one wins on something the Spectre gives up.
SilencerCo Omega 9K: The Budget Steel Option
Who this is for: the high-volume 9mm shooter who wants a proven, durable can for less money and doesn’t mind carrying the extra weight.
The Omega 9K (SKU SU1544) is the Spectre’s older, heavier stablemate. SilencerCo builds it from Cobalt-6 and 17-4 stainless, rates it for full-auto fire with pistol calibers, and lists it as compatible with subsonic and supersonic .300 BLK. It uses the same Alpha accessories, so pistons and mounts carry between the two. At around $621 on Guns.com against a $749 MSRP, it’s the least expensive can in this comparison, about $27 less than the Spectre 9.
The tradeoff is weight and size. At 7.3 ounces and 4.54 inches, the Omega 9K weighs nearly twice what the Spectre 9 does while being barely shorter, and its 1.48-inch diameter is wider. SilencerCo publishes 135.8 dB on 9mm and 133.7 dB on .300 BLK subsonic for it, without naming the hosts, so treat any comparison to the Spectre’s figures cautiously. SilencerCo’s own product page is also inconsistent about what ships in the box, so confirm the included mount with your dealer. Our full Omega 9K review covers it in depth.
Check the Omega 9K on Guns.com →
Dead Air Mojave 9: The Modular Titanium Rival
Who this is for: the shooter who wants one 9mm can that can run short on a pistol and long on a PCC, and will pay for it.
The Mojave 9 is the most direct titanium competitor, built from 3D-printed titanium with 7075 aluminum and stainless steel components. It’s modular, running at 5.89 inches and 8.2 ounces short or 7.64 inches and 9.6 ounces long. Dead Air rates it for full-auto fire on 9mm and subsonic .300 BLK, semi-auto on supersonic .300 BLK and 350 Legend, with no barrel restrictions. It also ships with a 1/2×28 piston, which removes one of the Spectre’s hidden costs.
What it costs is weight, length, and money. Even short, it’s more than twice the Spectre 9’s weight and more than an inch longer. At around $900 for the black version on Guns.com against a $1,099 MSRP, it’s also the priciest can here, about $252 more than the Spectre 9. Finish matters to the price too: Guns.com listed the silver version around $950 and FDE around $1,029, so check which color you’re buying. Our Dead Air suppressors guide covers the rest of the lineup.
Check the Dead Air Mojave 9 on Guns.com →
Rugged Obsidian 9: The Serviceable Workhorse
Who this is for: the shooter who wants to take the suppressor apart and clean it, and values an unconditional warranty over ounces.
The Obsidian 9 answers the Spectre’s biggest ownership limitation: it isn’t sealed. Rugged builds it with keyed 17-4 stainless baffles and a hard-coat anodized aluminum tube, designed with serviceability in mind. It’s modular through Rugged’s ADAPT module, at 7.8 inches and 12.7 ounces in standard configuration or 4.85 inches and 8.7 ounces short, and shares the Spectre’s 1.37-inch diameter. Rugged rates it for belt-fed use on pistol calibers up to 9mm and includes a 1/2×28 non-slotted piston. Rugged also says its pistons are cross-compatible with SilencerCo slotted pistons, and backs the can with its unconditional lifetime warranty.
The tradeoff is weight, and some fine print. Short, the Obsidian 9 is about the Spectre 9’s length at more than twice its weight. Rugged also sets barrel minimums for other calibers: 8 inches for subsonic .300 BLK and 9×39, and 16 inches for 350 Legend. At around $658 on Guns.com for the FDE version (MSRP $842), it’s a near price peer with the Spectre 9, so this one is a genuine coin flip between weight and serviceability. The link below goes to the FDE finish (OBSFDE9). Our Rugged suppressors guide covers the rest of the lineup.
Check the Rugged Obsidian 9 on Guns.com →
What the Spectre 9 Actually Costs
The can is the big line item, but the Spectre’s total cost depends heavily on your host, because the right mount or piston is often a separate purchase.
| Item | Approx. Cost | When You Need It |
|---|---|---|
| Spectre 9 (SU5422) | ~$648 street | Always (or the 9K at ~$757) |
| Federal transfer tax | $0 | Eliminated for suppressors as of January 2026 |
| SilencerCo piston | $89 MSRP | Tilting-barrel pistols; match your barrel’s thread pitch |
| Alpha Direct Thread Mount | $84 MSRP | Fixed-barrel carbines and PCCs only, never on moving-barrel pistols |
| Fixed Barrel Spacer (AC22) | $59 MSRP | Using a piston on a fixed-barrel host |
| 3-Lug Mount (AC2447) plus 3-lug muzzle device | $139, plus $89 MSRP per host | Quick-attach on subguns and PCCs |
| Accessory prices are SilencerCo MSRP. Dealer transfer fees and barrel threading vary by shop. Verify all pricing before purchase. | ||
For a typical pistol owner, the realistic total is the can plus one piston. That’s roughly $737 for the Spectre 9 or about $846 for the 9K at current Guns.com pricing, compared with a Mojave 9 or Obsidian 9 that include a 1/2×28 piston out of the box. If your pistol uses a different thread, such as the metric left-hand threads on some barrels, check SilencerCo’s piston fit guide before ordering.
Both Spectres’ street prices sit well below MSRP at the time of writing, and prices this far under list may not hold. Check the current price rather than assuming. If spreading the cost out helps, our gun financing guide covers how suppressor financing works.
Legal and Process Note
Suppressors remain federally regulated items even with the transfer tax removed. Unless your purchase is covered by the August 2026 court injunction, the Form 4 process still applies. Covered purchases from certain sellers in 27 states can use a standard Form 4473 instead, so ask your dealer which process applies. The ruling is still subject to appeal. For Form 4 buyers, ATF’s July 2026 data put individual eForm 4 approvals at roughly 9 days on average, while trust applications averaged around 33 days. State laws also vary, and some states prohibit civilian suppressor ownership entirely. Our suppressors guide covers the current legal picture in detail. This is information, not legal advice.
Living With a Spectre
Ownership Reality
The can is the easy part. With the piston sold separately, the first decision after you buy a Spectre is which piston, mount, or muzzle device matches each gun you plan to run it on.
Routine care is minimal because there’s little you can do to a sealed titanium can. SilencerCo’s Spectre 9 field manual says the Spectre typically requires limited maintenance: periodically clean the mounts and mounting surfaces with a standard gun solvent and a brush to keep alignment true, and don’t run cleaning patches through the bore, since they can lodge in the suppressor and cause damage on firing. SilencerCo compares the can to a car muffler and says cleaning the internal volume and baffles isn’t necessary. We didn’t find a separate field manual for the 9K, so check with SilencerCo for any 9K-specific guidance.
Mounting Checklist
For direct-thread use on a fixed barrel, SilencerCo’s manual calls for tightening the Alpha mount into the suppressor body to roughly 20 to 30 ft-lbs, then hand-tightening the suppressor onto the barrel to about 10 to 15 ft-lbs against a clean 90-degree shoulder. The mount can stay on the barrel and unthread from the body during removal, which is why it has internal wrench flats. On a pistol, the piston assembly is hand-tightened only. SilencerCo recommends checking that the suppressor is still secure after 30 discharges, and using heat-resistant gloves when removing it.
The practical takeaway is to set the can up for your hosts once, correctly. If you’ll run it on one pistol, buy the matching piston with the can. If you’ll move it between a pistol and a carbine, plan the piston and fixed-barrel hardware together so you’re not buying twice.
SilencerCo Spectre 9 FAQ
What’s the difference between the SilencerCo Spectre 9 and Spectre 9K?
The 9K is about 1.07 inches shorter (3.69 inches) and 0.73 ounces lighter (3.17 ounces). Both are all-titanium, share the same 1.37-inch diameter and Alpha mounts, and carry the same $879 MSRP. SilencerCo’s own spec sheets list the 9K roughly 13 dB louder on the one host they share, and at Guns.com it currently costs about $109 more.
Is the Spectre 9K the same as the Omega 9K?
No. The Spectre 9K is a 3.17-ounce titanium can, while the Omega 9K is a 7.3-ounce stainless steel and Cobalt-6 can. Both use Alpha accessories, but they’re different suppressors with different weights, lengths, and sound figures. Confirm the SKU before ordering: SU5528 is the Spectre 9K and SU1544 is the Omega 9K.
Does the Spectre 9 come with a piston?
SilencerCo’s spec sheets list the Alpha piston mount as included and the piston as sold separately. For a tilting-barrel pistol, plan on buying a piston in your barrel’s thread pitch, about $89 MSRP. Check what your specific dealer ships in the box, because retailer listings vary.
Is the Spectre 9 full-auto rated?
Yes, for 9mm. SilencerCo rates the Spectre Series for full-auto fire on subsonic and supersonic 9mm and on subsonic .300 BLK. Supersonic .300 BLK is rated for semi-auto only.
Can I clean the Spectre 9?
Only the mounts and mounting surfaces. It’s a sealed, fully welded suppressor, and SilencerCo says internal cleaning isn’t necessary. Don’t run patches through it, and don’t shoot unjacketed lead bullets, since that lead can’t be effectively removed. If you want a can you can disassemble, the Rugged Obsidian 9 is designed for it.
Can I use the Spectre 9 on .357 Magnum or .38 Special?
SilencerCo’s documents disagree. The product page’s tech-spec table lists .357 Mag and .38 Special for the Spectre 9, but its spec sheet and field manual list only 9mm and .300 BLK. Confirm with SilencerCo before running either cartridge. We found no listing of those calibers for the 9K.
Will my Omega 9K or Hybrid 46 accessories fit the Spectre?
Omega 9K accessories should, since both use SilencerCo’s Alpha system. Hybrid 46 direct-thread and ASR mounts are Bravo pattern and won’t. SilencerCo does list its pistons as compatible across the Spectre, Omega K, Hybrid 46, Osprey, and Octane families. Confirm each part number against SilencerCo’s fit list before assuming.
How long does it take to get a Spectre 9?
That depends on which process your purchase falls under. Unless your purchase is covered by the August 2026 court injunction, the Form 4 process still applies, and ATF’s July 2026 data put individual eForm 4 approvals at roughly 9 days on average. Covered purchases from certain sellers in 27 states can use a standard Form 4473 instead, so ask your dealer which process applies.
Bottom Line
If you want the lightest good-sounding 9mm can for a pistol or PCC, the SilencerCo Spectre 9 is the one to buy. It’s the less expensive Spectre at current street pricing and has much better published suppression. Budget for a piston.
If the last inch on a small pistol matters more than sound, the Spectre 9K is the smallest option here. Go in knowing it costs more and that SilencerCo’s own figures put it well above the Spectre 9.
If price and durability matter more than ounces, the Omega 9K is the least expensive can here and shares the Spectre’s Alpha accessories.
If you want one modular can with a piston in the box, the Dead Air Mojave 9 is the premium choice, and the Rugged Obsidian 9 is the serviceable one at nearly the Spectre 9’s price.
The whole decision inside the Spectre family comes back to one line. The 9K buys you an inch; the 9 buys you the suppression. For most shooters, that makes the Spectre 9 the easy call, especially while it’s selling this far under MSRP.
SilencerCo Spectre 9
Check current price at Guns.com →Around $648 at Guns.com. All-titanium, 3.9 oz, full-auto rated on 9mm
For purchases that still use NFA registration, see ATF’s National Firearms Act Division, which processes Form 4 and other NFA applications.
Sources: SilencerCo’s Spectre Series product page, Spectre 9 and Spectre 9K spec sheets, and Spectre 9 field manual; SilencerCo’s Omega 9K product page; Dead Air’s Mojave 9 product page; Rugged Suppressors’ Obsidian9 product page; current Guns.com pricing; industry reviews; and owner feedback.
Legal note: Suppressor laws vary by state and change frequently, and the August 2026 injunction remains subject to appeal. Verify current federal and state requirements with your dealer before purchasing. Always follow the manufacturer’s caliber, barrel length, mounting, and rate-of-fire guidance. Running an unrated configuration can damage the suppressor and potentially cause injury. This article is information, not legal advice.
Affiliate disclosure: Guns Ammo & Gear participates in affiliate programs and may earn a commission on purchases made through links on this page, at no additional cost to you. Affiliate relationships never determine which products we recommend or how we describe them.
Note: Prices are approximate and change frequently. Verify current pricing and specifications before purchasing.
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