Gear Review: JK Armament’s JK 105 VSX Custom-Built Suppressor

No one wants to have to pay Uncle Sam so much as a dollar more than they’re obligated by law. That goes doubly for the tax you’re forced to pay thanks to the Federal Firearms Act for the privilege of making your gun quieter and more comfortable to shoot. JK Armament shares your pain and makes sticking it to the ATF easy and satisfying.

The JK 105 VSX Suppressor is a wonderfully modular, configurable platform that lets you build the suppressor you want with as many baffles as you need to cover all of the calibers you want to shoot. Their website has a configurator for the JK 105 VSX that makes it easy to assemble exactly what you need for a range of rounds…and pay for only one $200 tax stamp.

The one I show in the video above covers the calibers I shoot most often — .22 and 9mm. That means I can use it with everything in between, too. With the right combination of light (aluminum) and heavy (stainless steel) baffles — particularly the first blast baffle in the stack — in my build, it will stand up to hotter loads like 5.7×28 rounds.

Shooting the JK 105 VSX 22/9mm on a PSA Rock 5.7

As you can see in the video, you can build a suppressor as long as you like, even combine baffle calibers. Just be sure that if you do that, you’re only shooting the smallest caliber to fit the smallest baffles (and end cap) in your stack. It’s an incredibly flexible and affordable way to build the silencer(s) you need, giving you the maximum flexibility to suppress the largest number of calibers you shoot.

 

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3 thoughts on “Gear Review: JK Armament’s JK 105 VSX Custom-Built Suppressor”

  1. Geoff "I'm getting too old for this shit" PR

    Would it be any quieter if you alternated 9mm and ..22lr baffles, and shot only .22lr in it, as an extra-long .22lr can?

    1. I am virtually certain that, the closer the inner diameter of your baffles are to your bullet diameter, the quieter your suppressor will be. (All other factors being equal.)

      For a different acoustic reason, the more space inside of the suppressor to contain and accommodate gas expansion, the quieter the suppressor will be.

      So, for a given outer diameter and length of suppressor, the closer the “bore” diameter of the suppressor is to the bullet diameter, the quieter it will be. In other words, shooting .22 LR out of a suppressor with .22 caliber baffles will be quieter than shooting .22 LR out of the same suppressor with 9mm (.355 caliber) baffles.

      The fun question is how much louder is a suppressor whose bore diameter is oversized compared to the same suppressor with the bore at exactly the right size. Some people say the increase in loudness for the suppressor with an over-sized bore diameter is negligible. Others say it is significant. I have no idea which camp is correct.

      1. The Octane is a suppressor made in both 9mm and .45 bores. The published specs for it show that at 9mm an Octane 9 is 127dB and an Octane 45 suppresses 9mm to 130.4 dB. Both can handle 300 BLK too; the Octane 9 suppresses 300 BLK to 129.5 dB and the Octane 45 suppresses 300 BLK to 133.5 dB.

        So, yes, it appears that for any given suppressor design, the closer to bore diameter it is, the quieter it can be, but whether the difference is significant or not is, I guess, up to the hearer. 3 to 4 dB is, in my experience, definitely noticeable and I would call it significant, others may not think it so bad.