Full Review: Silencer Central's Banish 9K Suppressor

Light and simple, the way we like it!

June 30, 2025 By Patrick Sweeney

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The big problem with pistol suppressors is that they add weight, and not just dead weight, but weight added to the reciprocating mass. So, they “stall” pistols. In order to keep them from malfunctioning it became necessary to use a booster, aka a Linear Inertial Decoupler, or Nielsen Device. This stores energy generated by recoil and adds it back into the cycling parts. The problems with this are many: It adds even more weight; with the spring, slider tube and rear cap. The extra parts all need enough clearance to slide, and this means there might be some droop, so the baffle clearances have to be larger. And the moving parts can shift the point of impact.

That is all old now that Silencer Central has the Banish 9K to offer. How’d they do that? Simple: titanium, 3D-printed titanium. By building up the Banish 9K in the latest industrial metal-printing machines, they can solve several problems at once.

First, it is light enough to not need a booster. At 2.7 ounces, the complete Banish 9K is as light as some booster and rear cap assemblies I have on the shelf, and it is complete, one piece, just a pistol suppressor you thread onto our barrel. The second problem is how to make such a short suppressor as quiet as possible. Well, 3D printing solves that problem as well. Short of cutting it open (and I’m sure someone, somewhere, will do that, if only a competitor to see how Silencer Central has done it), we don’t know what the internal structure is like, but 3D printing lets you (well, the manufacturer) craft baffle designs that cannot be machined. The spec sheet that Silencer Central handed me back when the Banish 9K was first unveiled speaks of eight baffles in a four-inch-long suppressor. There’s magic going on in there, folks, and it is just 1.3 inches in diameter as well. So, despite being a mere 4.1 inches long, the Banish 9K drops the decibel level to the shooters ear down to 132 dB.

Author shooting a pistol with the 9K — There’s a streak from the bullet’s path coming from the frontcap of the Banish 9K. (Photo provided by author.)

As a unitary piece, the rear of the Banish 9K is direct-thread, and here they offer both the American ½-28 and the metric M13.5x1LH for those of you who have a Euro-pistol that came threaded wrongway backwards. (Yep, I’ve got one around here someplace….) The direct-thread aspect means that you don’t have to rebuild or lock out your booster in order to put the Banish 9K onto your PCC or SBR/subgun. Just thread it on.

Ratings? The Banish 9K handles all 9mm loads; sub and supersonic, any .380 you might have on hand with a threaded barrel, the various 5.8x28 pistols and PCCs you might have in the rack and even .300 Blackout. Not to leave anyone out, the Banish 9K is also listed as being suitable for the .38 Special and .357 Magnum, the .38 Auto (I have to assume this also includes the .38 Super), and the .30-30. So, if you want to use a lever-action rifle for hunting (where hunting with a suppressor is allowed) then you can put the Banish 9K on the muzzle of a whole host of hunting-suitable leverguns. It is full-auto-rated for 9mm and .300 Blackout subsonic loads.

Threads on 9k — Since the Banish 9K doesn’t need a booster, it can be a simple direct-thread mount. And so it is. (Photo provided by author.)

Now, the Banish 9K, being threaded ½-28 means it will fit onto a .22LR. My advice would be not to use it on a rimfire. .22LR ammunition is so incredibly dirty that you risk gunking up your Banish 9K, and cleaning would be difficult at best. This would also apply to using it on a lever action rifle and ammunition with lead bullets. You’ll want to be using jacketed bullets in your .38 Special, .357 Magnum and .30-30 loads, when the Banish 9K is installed. You can’t shoot enough supersonic 9mm through it to burn out the gunk, as you can easily do with a suppressor built for 5.56. Various chemical and ultrasonic cleaners might get it clean, but I’d hate to find out they can’t quite handle the task. No, leave the rimfire work to your rimfire suppressor, of which Silencer Central has many to offer you, including a Banish 22.

The exterior of the Banish 9K, since it is manufactured by way of the additive process, has a certain non-slip texture anyway. Silencer Central adds to this by including spiral flutes on the body, so you can get a good grip on it when you install or remove it. Now, the direct-thread aspect of the Banish 9K does create some limitations. If your .300 Blackout or .30-30 is threaded 5⁄8-24 then you will need two things: an adapter muzzle device, and an alignment rod to check that things stay straight when you put the muzzle device on and then the Banish 9K. Such an adapter, threaded ½-28 on the inside and 5⁄8-24 on the outside, needs to be a precision-machined part. It can’t be a “close enough” that came off of a hobbyist lathe from the guy down the block who machines things as a hobby. (Well, it might be straight enough, but the alignment rod will tell you yes or no.)

Front cap — The front cap is simple, because it is 3D printed and not disassemblable, so nothing to service. Just keep it clean. (Photo provided by author.)

In testing the Banish 9K on three different pistols, it worked as advertised. None failed to cycle, and all locked open when empty, so the supermodel-class weight of the Banish 9K clearly didn’t bother these pistols. That said, I’d bet there is some pistol out there, one fed with the softest 9mm factory ammo to be had, that will demonstrate recalcitrance at getting with the program. If that’s the case, then don’t use that ammo. Quiet? Oh yes. Not Hollywood quiet, no-one can deliver that, but quiet enough that an afternoon shooting unprotected would be enjoyable. And if you want it to be really quiet? Put the Banish 9K onto your pistol-caliber carbine. The sixteen-inch barrel drops a bunch of decibels off of the muzzle blast just for starters, and the Banish 9K scavenges more off of that. You’ll hear the bolt slapping back and forth, and the rest of the noise will be a contest of “how loud?” between the bullet hitting the backstop or the brass hitting the ground.

You get all this, and the envy of your fellow gun club members for a mere $699 MSRP. There was a time when merely hearing the word “titanium” spoken of suppressors would make shooters blanch. It was expensive. Well, no more. The use of additive manufacturing has taken the expense of titanium-fabricated parts and made them common, and at common prices. So, what are you waiting for?