The SilencerCo Omega 9K is the heavyweight of the compact 9mm cans, and that’s the point. At about 4.5 inches and 7.3 ounces, it’s a fully welded can built from Cobalt-6 and 17-4 stainless, rated for 9mm plus both subsonic and supersonic .300 Blackout, and full-auto rated with pistol calibers. At $621.99 at Guns.com against a $749 MSRP, it was also the least expensive can in this comparison. The tradeoff is weight and setup: the titanium cans it competes with weigh roughly half as much or less, and the Omega 9K ships with a 5/8×24 mount and no piston, so most 9mm pistol owners will need extra hardware before it goes on their gun.
The verdict: Buy the Omega 9K if your can will live on a pistol-caliber carbine, a subgun, or a .300 Blackout host and you want the only Cobalt-6 and 17-4 stainless compact can in this comparison, for the least money. If it’s mostly for a handgun you carry or shoot often, the titanium Spectre 9 weighs 3.9 ounces for $26 more. If you want a can you can take apart and clean, the modular Rugged Obsidian 9 is user-serviceable and ships with a 1/2×28 piston.
The Omega 9K shows up in a lot of searches alongside other “9K” suppressors, and they aren’t the same thing. Sorting out which one you’re actually looking at is half of this review.
How We Evaluated It
We built this review from SilencerCo’s published specifications, current Guns.com and Silencer Central listings, and independent coverage, and compared the Omega 9K against published data for the Spectre 9, Spectre 9K, Banish 9K, and Rugged Obsidian 9.
Buying the SilencerCo Omega 9K
There’s one Omega 9K, but how it ships matters more than usual. Both Guns.com and Silencer Central list it with a 5/8×24 Alpha direct-thread mount installed.
| Listing | Guns.com Price | Length | Weight | Mount Included | Fits Out of the Box |
|---|---|---|---|---|---|
| SilencerCo Omega 9K | $621.99 | About 4.5″ | 7.3 oz | 5/8×24 Alpha direct thread | Hosts threaded 5/8×24 |
| Guns.com price and listing details checked September 2026. SilencerCo’s spec table lists the length at 4.54″; its marketing copy elsewhere on the same page says 4.56″. MSRP $749. | |||||
That mount fits .300 Blackout rifles and other hosts threaded 5/8×24. Most 9mm pistols and many pistol-caliber carbines are threaded 1/2×28, so those owners need a 1/2×28 Alpha direct-thread mount to run it on a fixed barrel. Tilting-barrel pistols need a piston matched to the barrel thread; the Omega 9K’s product description lists the spring and spring retainer as included, but not the piston. The 1/2×28 Alpha mount and the piston are separate accessories. Budget for them before you order.
One caution on the box contents: SilencerCo’s own page isn’t consistent. Its product description lists the 5/8×24 mount, piston spring, retainer cap, and a 3-lug tool, while its spec table lists only the 3-lug tool. Confirm exactly what ships with your dealer before you plan your hardware.
Check the Omega 9K at Guns.com →
Buying a Suppressor in 2026
The federal transfer tax on suppressors is now $0, down from $200. 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. State and local restrictions also remain. Our suppressors guide walks through the current process.
In this review
SilencerCo Omega 9K Specs
Calibers9mm, .300 BLKSubsonic and supersonic .300 BLK
Length4.54″1.48″ diameter
Weight7.3 ozPer SilencerCo
MaterialsCobalt-6, stainlessTubeless, fully welded
Mount systemAlpha5/8×24 direct thread as listed
Full autoRatedWith pistol calibers
ServiceableNoSealed, welded design
Pistol usePiston neededSold separately
Published sound135.8 dB9mm; 133.7 dB .300 BLK sub; hosts not listed
MSRP$749About $622 at Guns.com
The Omega 9K uses a tubeless, fully welded construction, which means there’s no separate outer tube around the baffles. That’s part of why it’s so durable for its size, and also why it can’t be taken apart. SilencerCo recommends against lead projectiles in its sealed suppressors, so stick with jacketed ammunition. SilencerCo doesn’t name the host firearms behind its published sound figures, so treat them as manufacturer reference numbers rather than something to compare across brands.
What the Omega 9K Does Well
It’s built for hard use. Cobalt-6 and 17-4 stainless in a welded, tubeless body make the Omega 9K the only Cobalt-6 and 17-4 stainless can in this comparison. SilencerCo rates it for full-auto fire with pistol calibers, which is why retailers point it at subguns and pistol-caliber carbines, hosts that can dump rounds faster than a handgun ever will.
It’s rated for supersonic .300 Blackout. SilencerCo rates the Omega 9K for both subsonic and supersonic .300 Blackout. The titanium Spectre 9 is explicitly limited to semi-auto with supersonic .300 BLK. SilencerCo’s full-auto rating for the Omega 9K is stated for pistol calibers, so confirm rate-of-fire limits with SilencerCo before running supersonic .300 BLK fast. If you run a .300 Blackout host alongside your 9mm guns, the Omega 9K covers both jobs in one short can.
It’s short. At about 4.5 inches, it adds little length to a carbine or subgun, which keeps handling close to unsuppressed.
It was the least expensive can we compared. At $621.99 at Guns.com, it undercut the Spectre 9, Obsidian 9, Banish 9K, and Spectre 9K. In this group, less money buys more durability, and more money buys less weight.
SilencerCo Omega 9K
$621.99 at Guns.com when we checked, the least expensive can in this comparison
The “9K” Name Game
Search for a “9K” suppressor and you’ll find at least three different cans. They share a name fragment and very little else.
The Omega 9K is SilencerCo’s Cobalt-6 and stainless compact can: 7.3 ounces, welded, rated for supersonic .300 Blackout. The Spectre 9K is a different SilencerCo line entirely, a shorter titanium can listed at 3.69 inches and 3.17 ounces. The Banish 9K is from another company altogether, a 3D-printed titanium can Silencer Central lists at 4.1 inches and 2.7 ounces. And the full-size Spectre 9 sits between them at 3.9 ounces.
The price order doesn’t follow size, either. At Guns.com, the smallest SilencerCo can in this group, the Spectre 9K, cost $756.99, about $135 more than the Omega 9K and $109 more than the larger Spectre 9. It also gives up suppression: on the one host both Spectre spec sheets share, SilencerCo lists the Spectre 9K nearly 13 dB louder than the Spectre 9. Our SilencerCo Spectre 9 review breaks down that tradeoff in detail.
The Practical Reading
Don’t shop by “9K.” Shop by weight and host. The Omega 9K is the heavy, tough one for carbines and subguns. The titanium cans are the light ones for handguns.
Known Issues
Five Things to Know Before You Buy
- It ships with a 5/8×24 mount. Both Guns.com and Silencer Central list it with a 5/8×24 Alpha direct-thread mount. Most 9mm pistols and many PCCs are threaded 1/2×28, so plan on a 1/2×28 Alpha mount, sold separately.
- Pistol use needs a piston. Tilting-barrel pistols need a piston matched to the barrel thread, sold separately. SilencerCo’s product description lists the spring and spring retainer as included, so the piston is the part you’re most likely missing. Confirm the box contents with your dealer.
- It’s heavy for a compact can. At 7.3 ounces, it weighs nearly twice as much as the Spectre 9 and nearly three times as much as the Banish 9K. On a handgun, that’s noticeable.
- It can’t be taken apart. The tubeless, welded construction is sealed, and SilencerCo recommends against lead projectiles in its sealed cans. If you want to clean a can yourself, the Rugged Obsidian 9 is user-serviceable.
- Sound numbers aren’t comparable across brands. Rugged, Banish, and SilencerCo publish sound figures measured differently, some at the muzzle and some at the shooter’s ear, so we don’t rank these cans by published dB numbers.
Who Should Skip It
Where to Look Instead
- If the can is mostly for a handgun → the titanium Spectre 9 weighs 3.9 ounces for $26 more. Like the Omega 9K, it needs a separately purchased piston for tilting-barrel pistols.
- If you want the lightest compact can → the Banish 9K is 2.7 ounces, and Silencer Central says it runs on pistols without a piston.
- If you want to clean it yourself → the Rugged Obsidian 9 is user-serviceable, modular, and ships with a 1/2×28 piston.
- If you want one can for pistols and rifles → our SilencerCo Hybrid 46 review covers the multi-caliber option.
Omega 9K vs. the Alternatives
| Model | Guns.com Price | Weight | Length | Material | Serviceable | Best For |
|---|---|---|---|---|---|---|
| Omega 9K | $621.99 | 7.3 oz | 4.54″ | Cobalt-6, stainless | No, welded | PCCs, subguns, .300 BLK |
| Spectre 9 Ti | $647.99 | 3.9 oz | 4.76″ | Titanium | No, welded | Handguns |
| Rugged Obsidian 9 | $658.00 | 8.7–12.7 oz | 4.85–7.8″ | Stainless baffles, aluminum tube | Yes | One can, two lengths |
| Banish 9K | $690.99 | 2.7 oz | 4.1″ | 3D-printed titanium | No, one-piece design | Carry pistols |
| Spectre 9K | $756.99 | 3.17 oz | 3.69″ | Titanium | No, welded | Shortest SilencerCo option |
| Guns.com prices checked September 2026. Specifications from manufacturer and retailer listings. | ||||||
Omega 9K vs. Spectre 9 is the in-brand decision most buyers face. The Spectre 9 is titanium, weighs 3.9 ounces, and costs $26 more. It ships with SilencerCo’s piston mount, but SilencerCo’s spec sheet lists the piston itself as sold separately, so pistol owners buy a piston for either can. It’s explicitly limited to semi-auto with supersonic .300 Blackout. For a handgun, the Spectre 9’s weight savings is the bigger deal. For a carbine or subgun, the Omega 9K’s Cobalt-6 and 17-4 welded construction is. Our Spectre 9 review covers that can in depth.
Omega 9K vs. Rugged Obsidian 9 is a serviceability question. The Obsidian 9 runs at 4.85 inches or 7.8 inches with Rugged’s ADAPT module, is user-serviceable with 17-4 stainless baffles, and ships with a 1/2×28 piston and a 9mm front cap. It’s heavier in both configurations and costs about $36 more, but it goes on most 9mm pistols out of the box and comes apart for cleaning. Rugged rates it for pistol calibers up to 9mm plus subsonic .300 Blackout on 8-inch barrels and up. See our Rugged suppressors guide for the rest of the lineup.
What You’ll Actually Pay
The suppressor price is the starting point, not the total. Budget for the can, the $0 federal transfer tax, shipping, any dealer or NFA transfer fee, applicable sales tax, and the mount or piston your gun needs. For the Omega 9K on a 1/2×28 pistol, that means extra Alpha hardware.
Omega 9K vs. Banish 9K is weight against durability. Silencer Central lists the Banish 9K at 2.7 ounces and 4.1 inches, built as a one-piece 3D-printed titanium can, and says it cycles on pistols without a piston, while noting that minor spring, weight, or ammunition adjustments may be needed. Silencer Central lists the Banish 9K for .380, 5.7×28, 9mm, and .300 BLK, with full-auto ratings for supersonic 9mm and subsonic .300 BLK. It costs about $69 more. For a carry pistol, the Banish’s weight is hard to argue with. For hard use on a carbine, the Omega 9K is the sturdier can.
Check the Banish 9K at Guns.com →
For the full SilencerCo lineup mapped side by side, see our SilencerCo suppressors guide, and for the wider pistol-can field, our best 9mm suppressors guide.
Living With the Omega 9K
Ownership Reality
The Omega 9K is built for hard use, but its included 5/8×24 mount happens to make many .300 Blackout hosts ready to go out of the box. On a typical 1/2×28 pistol or PCC, the first thing you may need after the can is the hardware that makes it fit.
Match the mount to the host. On a fixed-barrel PCC or subgun threaded 1/2×28, swap to a 1/2×28 Alpha direct-thread mount. On a tilting-barrel pistol, add a piston matched to the barrel thread; SilencerCo’s description lists the spring and spring retainer as included. On a .300 Blackout rifle threaded 5/8×24, the included mount is ready to go.
Don’t Forget the Mounting Hardware
SilencerCo’s Alpha mounts are shared across the Omega K series and Spectre cans, so hardware you buy for the Omega 9K can carry over if you add a Spectre later. Alpha mounts don’t cross over to SilencerCo’s Bravo or Charlie cans, like the Hybrid 46 or Omega 36M, but SilencerCo pistons are the exception: SilencerCo lists its pistons as compatible across the Omega K, Spectre, Hybrid 46, and Omega 36M families.
Keep it jacketed. Because the can is sealed, fouling stays inside. SilencerCo recommends against lead projectiles in sealed suppressors, which matters for anyone tempted to shoot cheap cast-lead 9mm through it.
Check the mount’s tightness. Direct-thread mounts can loosen with use, and a loose can shifts point of impact. Check it at the start of each session.
Keep hearing protection handy. A suppressed 9mm is much quieter than an unsuppressed one, but it can still be loud enough to damage hearing, especially with supersonic ammo. Our ear protection guide covers options that still make sense.
SilencerCo Omega 9K FAQ
What calibers is the SilencerCo Omega 9K rated for?
SilencerCo rates the Omega 9K for 9mm plus both subsonic and supersonic .300 Blackout, and rates it for full-auto fire with pistol calibers. Confirm rate-of-fire limits with SilencerCo before running supersonic .300 Blackout fast.
What thread does the Omega 9K come with?
Both Guns.com and Silencer Central list it with a 5/8×24 Alpha direct-thread mount. Most 9mm pistols and many PCCs are threaded 1/2×28, so fixed-barrel hosts need a 1/2×28 Alpha mount, and tilting-barrel pistols need a piston matched to the barrel thread. Both are sold separately.
Is the Omega 9K the same as the Spectre 9K?
No. The Omega 9K is a 7.3-ounce welded Cobalt-6 and stainless can. The Spectre 9K is a separate titanium can listed at 3.69 inches and 3.17 ounces, and SilencerCo’s own spec sheets put it nearly 13 dB louder than the larger Spectre 9. The Banish 9K is from a different company entirely.
Can you use the Omega 9K on a pistol?
Yes, with a piston matched to your pistol’s barrel thread, sold separately. SilencerCo’s product description lists the spring and spring retainer as included, but not the piston. At 7.3 ounces, it’s heavy for a handgun, so the titanium Spectre 9 is often the better handgun choice, though it also needs a separately purchased piston.
Can you clean the Omega 9K?
The Omega 9K isn’t user-serviceable and can’t be disassembled, because it’s a tubeless, fully welded, sealed can. You can still keep the mount clean and check it for tightness, but follow SilencerCo’s current manual for any approved cleaning of the suppressor itself. SilencerCo also recommends against lead projectiles in its sealed suppressors. If you want a can you can take apart, the Rugged Obsidian 9 is user-serviceable.
Should I buy the Omega 9K or the Spectre 9?
Choose by host. For a handgun, the 3.9-ounce Spectre 9 is the better fit for about $26 more. For a PCC, a subgun, or supersonic .300 Blackout, the Cobalt-6 and stainless Omega 9K is the sturdier choice. Either one needs a separately purchased piston for tilting-barrel pistols.
Do you still pay a $200 tax on an Omega 9K?
No. As of 2026, the federal transfer tax on suppressors is $0. Unless your purchase is covered by the August 2026 court injunction, which lets certain sellers transfer covered suppressors on a standard Form 4473 in 27 states, the Form 4 process still applies. Some states prohibit suppressors entirely.
Bottom Line
If your can will live on a PCC, a subgun, or a .300 Blackout rifle, the Omega 9K at $621.99 is the only Cobalt-6 and 17-4 stainless can here, and the least expensive.
If it’s mostly for a handgun, the Spectre 9 weighs about half as much for $26 more.
If you want to clean it yourself, the Rugged Obsidian 9 is user-serviceable and ships with a 1/2×28 piston.
If every ounce matters, the Banish 9K is 2.7 ounces.
If you want SilencerCo’s shortest option, the Spectre 9K is 3.69 inches, at the highest price in the group and with a much higher published sound level than the Spectre 9.
Ready for the Tough One?
The Omega 9K was $621.99 at Guns.com when we checked
For current federal requirements, see the ATF’s National Firearms Act Division, which processes Form 4 and other NFA applications.
Sources: SilencerCo product specifications; Rugged Suppressors and Silencer Central published specifications; Guns.com and Silencer Central listings; independent coverage including Shooting Illustrated.
Legal note: This article is for information only and is not legal advice. Suppressors remain regulated under the National Firearms Act, and some states and localities prohibit them entirely. Verify current federal, state, and local law before purchasing, transporting, or using any suppressor.
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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