Introduction
With as much activity as there currently is in the suppressor market, it should come as no surprise that manufacturers are trying different things. Today am bringing you one of those. Anechoic has been making suppressors for several years now, and I’ve had the good fortune to use several of their products. One of their newest models is the Fibonacci 9mm suppressor, a compact and lightweight suppressor made from titanium and aluminum using new technologies. Its an interesting suppressor to say the least, but lets dive straight into the Anechoic Fibonacci 9mm suppressor.
The Anechoic Fibonacci 9mm
Why the interesting name you might ask? I suspect the design of the suppressor follows the popular mathematical sequence, or maybe they were simply fans of the famous mathematician. Either way, it sounds cool so we’ll run with it.
The Fibonacci 9mm came to me with very little information due to its recent release. But I did know that it only weighed an alarmingly three ounces, less than a deck of cards. I guess you could say I was excited to see how such a thing could be done. And once I opened the box it made sense. The Fibonacci uses the same size body as Anechoic’s rimfire 22 suppressors. And inside the tube you will find an amazing core printed from titanium. The incredibly intricate core has the appearance of a roll of fencing that has been shrunk to the size of a cigar.
In addition to the 9mm muzzle port, the Fibonacci incorporates a series of tiny holes around the tube towards the muzzle end. In an effort to start venting pressure I assume.
The core is sandwiched between the front and rear caps of the tube, both of which are threaded into the tube. Like other Anechoic cans, the Fibonacci comes with tools to disassemble the silencer. It is threaded 1/2-28 on the hub to allow attachment to various host firearms. The Fibonacci is designed to be used without a booster, which does limit its application. According to the manufacturer, the Fibonacci can be used booster-less on some pistols provided they meet some parameters.
Specifications
| Manufacturer | Anechoic |
| Model | Fibonacci 9 Ti |
| Caliber | 9mm |
| Maximum Chambering | 9mm |
| Material | Titanium |
| Length | 6.1 inches |
| Diameter | 1.6 inches |
| Weight | 3 ounces |
| Sound Reduction | 26 dB |
| Mount | Direct thread |
| Thread | 1/2-28 |
| Booster | Not required under prescribed host conditions |
| Construction | 3D-printed DMLS titanium core |
| Finish Options | Black, FDE, or raw/in-the-white |
| MSRP | $548 |
Shooting with the Anechoic Fibonacci
As I mentioned, the manufacturer has some pretty rigid conditions for the Fibonacci to work on slide action pistols. Using things like high pressure ammo, removing mass from the slide (red dots) and so on. Initially I tried a couple different pistols, and as expected they did not cycle because they were not meeting the conditions outlined by Anechoic.
It didn’t take long for me to lose interest in trying to get additional pistols to work, so instead I decided I might just use the Fibonacci for my pistol caliber carbines (PCC) instead. Because those firearms are less affected by a suppressor, and I needed a can for my PCC’s anyways.
For that purpose, I threaded the impossibly lightweight Fibonacci onto my new Taurus RPC. A roller-delayed 9mm PCC. Shooting a few rounds through it to see how they got along show some very interesting patterns. Likely caused by some remaining titanium dust within the core, the Fibonacci sent a radial flower of sparks out through the tube vents, making a very interesting and just plain cool shot. The sounds was a touch more than I expected, but I guess a 9mm suppressor that is the same size and weight as a 22 rimfire suppressor is going to be a bit louder.
Additionally I used the Fibonacci on another PCC, the Panzer USA HAN 9. The HAN 9 is a blowback operated gun, which I expected to also be a touch louder than the RPC. And I was right, because the blowback actions open sooner there is a bit more noise.
Sound Suppression
Minimalist suppressors often has less sound suppression. One thing I find with people after they buy their first suppressors, they often start picking more specialist suppressors. And a minimalist suppressor (shorter or smaller) with its slightly less effective sound suppression is a bit of a luxury item.
With such a tiny size, and incredibly light construction, I wasn’t surprised that the Fibonacci was a bit louder than other options. It was more than adequate for outdoor shooting without ear protection, but it wasn’t as quiet as my other 9mm options.
Perhaps I’m at that point where I can justify the luxury of specific cans that are not as effective?Either way, if it was the only 9mm suppression you had, it might be enough. I am also curious as to whether or not shooting something like a subsonic 300Blk through the can would be sufficiently quiet.
Recoil
Because the Fibonacci is so small, the effect on recoil is minimal. As a matter of fact, it is so insignificant you wouldn’t even know its there if you couldn’t see it. But there is also a downside I guess since the Fibonacci doesn’t have a booster. The lack of a booster makes it difficult for slide action pistols to open and cycle. Using heavy loads is required to work them according to the manufacturer, something I was unable to replicate.
Blowback and roller-delayed carbines on the other hand worked fantastic. Since they have fixed barrels. The same way fix-barreled pistols work well with it. That is an important thing to know going in with this suppressor.
Accuracy
As 9mm firearms aren’t exactly sharpshooting ones, I couldn’t really tell if the Fibonacci enhanced or reduced accuracy of the test guns. Normally suppressor add enough weight to help settle down the host, making better shooting possible. But of course the Fibonacci weighs next to nothing, so that is a moot point.
Value
With an MSRP of $548, the Fibonacci is not what I would call an entry level suppressor. There are plenty of other 9mm suppressors for hundreds less, but as I’ve mentioned several times now, the Fibonacci sets itself apart. It stands alone in weight class, which alone would justify its price. But its also very specific in its functioning parameters, requiring a very specific setup to function. These attributes make the Fibonacci a limited use suppressor in my mind, as most other suppressors will function on most typical hosts.
With that in mind, I would say the Fibonacci is a great suppressor for those looking for specialty application. If you are looking for your very first 9mm suppressor for your slide operated pistol, you might find it challenging. Whereas if you understand what is required to use it, or the conditions where it works great you will be very happy with it.
Pros and Cons
| Incredibly light weight | Will not cycle with all pistols |
| Compact size | Not the quietest suppressor out there |
| Doesn’t require booster* | |
| Handsome looks | |
| Full disassembly for service | |
| Handsome Cerakote finish |
Should you buy the Anechoic Fibonacci 9mm?
If you haven’t figured out yet, I think the Anechoic Fibonacci 9mm suppressor is a very cool suppressor for those willing to work with it. I will most likely keep using the Fibonacci on my PCC’s where it performs flawlessly regardless of host. Its unlikely I will use it often with pistols mainly since I usually shoot lightweight 9mm ammo on optics ready pistols which it doesn’t play well with. But if you are looking for the lightest, most compact option, you need to look at this one.