Short Cans
As a long-time suppressor enthusiast I rarely see one I don’t want. In the decades since my first suppressor interaction however, I have noticed a few things about short suppressors. For a long time, there were suppressors designed primarily for law enforcement and military use that were very short. This effected their ability to subdue the report of a rifle to my taste. Times are changing however, and today we are looking at two very short and compact suppressors that do exactly what you’d want them to do. We are comparing the YHM Fat Cat VS. Banish Speed K.
Both of these suppressors are very compact, and they both do a good job of subduing rifle noise. So today I wanted to put them up against each other to see which one I would pick if I couldn’t have both. These compact suppressors are designed for use on 5.56 or .223 caliber semi-auto rifles which most of us commonly use. My analysis will be based on various features but most importantly how these can’s stand up to a heavily used carbine or what many have colloquially called a “fighting rifle” or “battle rifle”.
Fat Cat and Banish Speed K Specifications
| YHM Fat Cat | Banish Speed K | |
| Caliber | 5.56mm | .223/5.56mm |
| Weight | 13.2oz (with adaptor) | 14.1 oz |
| Length | 4.5” (with adaptor) | 4” |
| Diameter | 1.94” | 2” |
| Construction Material | 17-4 Stainless/ Cobalt 6 | Inconel |
| Decibel Reduction | 20dB | 20.9dB |
| Minimum Barrel Length | 10” min. | None |
| Full-Auto Rated | Yes | Yes |
| Mount Style | Ind. Standard Hub Mount | Ind. Standard Hub Mount |
| Finish | Black Cerakote | Black Cerakote |
| Warranty | Limited Lifetime | Limited Lifetime |
| Baffle Design | Traditional Stacked baffles | Controlled Flow |
| User Serviceable | No | No |
| Included Mount | ½-28 sRx Mini QD brake | ½-28 Direct Thread |
These two suppressors are very similar in size and specifications though there are some differences. The biggest differences that I feel are important I’ll point out here; The Banish Speed K is either 3D printed or DMLS fabricated from Inconel. Inconel is a very robust material (nickel chromium alloy) that is very resistant to both heat and abrasion. This makes the Speed K one solid piece of material, which can be very robust. But for those of us who have broken suppressors before, it makes them nearly impossible to repair if needed. The Speed K uses a finned blast chamber and clipped wall baffles to help reduce sound.
The YHM Fat Cat is built in the more traditional fashion, welding together 17-4 Stainless steel. It uses a cobalt 6 blast baffle to help tame the extreme pressure, heat and abrasion coming from the muzzle. Cobalt 6 (cobalt-chromium-tungsten alloy) is also very resistant to heat and erosion. The fat cat uses an interesting funnel shape to increase the volume of the blast chamber, and it appears the design also helps create a turbulent flow to help reduce sound.
Both suppressors use the industry standard hub mounting system. I can’t tell you how much I like and appreciate the industry moving this direction. It has made mounting your suppressors infinitely easier. You can use whichever mounting system you prefer, whether it be the YHM sRx QD system as provided with the Fat Cat, or something else like the Dead Air KeyMo system, or Plan B from Q. Both suppressors also use a tri-clipped muzzle port, this has become a common feature among many cans.
Host Firearms
To properly test these two suppressors, I put together a small collection of rifles that would give them both a good workout. For pure sound testing, I would run them on my Savage Model 12 chambered in .223. The bolt-action rifle would give the best opportunity to hear the report of both suppressors. I would also use My Desert Tech WLVRN with the 20-inch .223 barrel, the adjustable gas system of the WLVRN would allow me to tune for performance and see how the two cans affected its function.
Additionally I would run them both on a couple other AR15 based rifles like most folks would likely use. One of them a 16-inch Aero Precision build and the other a short barreled 5.56 that we’d also run some full auto through the cans.
Shooting the YHM Fat Cat and the Banish Speed K
Sound Suppression
Shooting these two suppressors across the host firearms gave a pretty good idea of how they compare. I kept switching them out back and forth to compare.
Both suppressors sounded very hearing safe on the longer rifles. The 16″ Quattro 15 and the 20″ WLVRN were very pleasant to shoot without hearing protection. Of course I have to add the caveat that you should always wear ear protection, even when suppressed.
Backpressure
Almost every suppressor out there adds at least some back-pressure in my experience. And these two were not exempt.
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