JK 155 PCX™ .45cal


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A .45cal suppressor ready to rock on pistols, submachine guns, carbines, and even hunting rifles Rated for .45ACP & 9mm full-auto use and light-to-medium use on rifle calibers up to 300 Win Mag & 45-70 HUB compatible; ships with JK taper mount
SKU: JK-155PCX45 Categories: , , ,
  • Specs
  • Features


There’s quiet on a dB meter, and then there’s quiet to the ear. With JK Armament’s Tone Technology, you get both! Tone Technology refines the 155 PCX .45cal sound signature for a solid, deep tone that’s more pleasing to the ear.

Lightweight, durable, and fully Mission Configurable, the JK 155 PCX.45cal suppressor is right at home on every 9mm or .45cal in your collection, from handguns to full-auto subguns. At the same time, it’s stout enough for use on rifles chambered in 300 Blackout, 8.6 Blackout, 350 Legend, 45-70, 300win mag and many more.

A Grade 5 Titanium JK 155 PRO blast baffle and seven user-configurable 7075 billet JK 155 LT modular baffles combine for an ideal balance of strength and weight. JK’s Tone Technology delivers industry-leading sound reduction along with a solid, deep tone that’s more pleasing to the ear.

In its micro configuration, the PCX .45cal is 3.3 inches long and weighs a shockingly light 3.7 ounces. In its full configuration with all eight baffles, it’s still only 8.7 inches long and weighs just 11 ounces. By simply adding or removing baffles – no specialized tools are needed! – the user is able to choose the length, weight, and sound suppression that’s right for the firearm and the mission.

The JK 155 PCX .45cal is rated for .45cal full-auto use as well as for use on other pistol calibers from 25 ACP on up to 357 Magnum, and even on 300 Blackout, all without barrel length restrictions. It can even be used on rifles chambered in 223/5.56, 350 Legend, 308 Win, 300 Win Mag, and more with varying barrel length requirements. This makes the 155 PCX an extremely versatile choice! 

In addition to the modular baffle and end cap design, the 155 PCX is even more Mission Configurable thanks to its industry-standard HUB 1.375×24 mount size. This means dozens of mounting options are instantly available! From the included JK 155 LT Quick Attach Taper Mount, which fits our industry-leading JK muzzle devices, to pistol boosters, direct thread fixed mounts, tri-lug mounts, QD mounts, and much more, the versatility of the HUB standard can’t be overstated.


(1) JK 155 LT Quick Attach Taper Mount

(1) JK 155 LT 2.5” Tube

(1) JK 155 PRO Pistol Baffle

(7) JK 155 LT Pistol Baffle

(1) JK 155 LT Flash Reducer End Cap


Spec NameSpec Value
Length: 3.3 - 8.7” (Configurable)
Length No Mount: 2.8" - 8.2” (Configurable)
Diameter: 1.55”
Weight: 3.6 oz - 11 oz (Configurable)
Color: Black
Material: Ti-6AL-4V (Grade 5) Titanium & 7075 Billet Aluminum
Coating: Type 3 Hard Anodize & Cerakote
9x19mm, 38 Special, 357 Magnum, 40 S&W, 10mm Auto, 45 ACP, and all smaller pistol cartridges Full-Auto: No Minimum Barrel Length.
300 Blackout Full-Auto: No Minimum Barrel Length.
Minimum Barrel Length: 450 Bushmaster, 458 SOCOM Full-Auto: 8"
Minimum Barrel Length: 350 Legend, 45-70 Gov’t, 450 Marlin Full-Auto: 16"
Minimum Barrel Length: 223 Rem / 5.56 NATO Sporting: 14.5"
Minimum Barrel Length: 7.62x39 Sporting: 8.5"
Minimum Barrel Length: 243 WIN Sporting: 16"
Minimum Barrel Length: 308 WIN / 7.62X51 NATO Sporting: 16"
Minimum Barrel Length: 6.5 CREEDMOOR Sporting: 16"
Minimum Barrel Length: 7MM REM MAG Sporting: 20"
Minimum Barrel Length: 300 WIN MAG Sporting: 20"


Pride and quality workmanship goes into all of our American-made, JK products, and we stand behind them! WE GUARANTEE OUR PRODUCTS

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Example Build 1
Example Build 2
  • 155 Series
  • HD base tube
  • Baffles:
    • 1x .30 cal HD Rifle
    • 4x .30 cal PRO Rifle
    • 5x 9mm LT Pistol
  • LT Extension Tube
  • End Caps:
    • 1x .22 cal LT Flash Hider
    • 1x .30 cal LT Compensator
    • 1x 9mm LT Flash Reducer
  • Mounts:
    • 1x PRO QA Taper Mount
    • 1x 1/2x28 Thread Mount
    • 1x 5/8x24 Thread Mount
    • 2x .22 cal Bald Eagle
    • 2x .30 cal Bald Eagle
    • 1x 9mm Bald Eagle
    • 1x 1/2x28 Pistol Booster

With this build I can suppress every .30 caliber and smaller rifle and every 9mm and smaller pistol in my collection. Whether I’m running my AR-15 or AR-10 hard – even full-auto – or I’m on a spot-and-stalk hunt with a lightweight bolt-action rifle, or I’m plinking or varmint hunting with a rimfire rifle, or I’m shooting pistols and pistol caliber carbines in 9mm or smaller, this one suppressor can be configured so it’s ideally suited for each and every one of those things and more.

Heck, if I also owned a 45 ACP pistol and/or a 458 SOCOM rifle or a .45 cal lever action I could add 5x .45 cal LT and/or PRO Pistol baffles and have those guns covered, too!

  • 105 Series
  • LT base tube
  • Baffles:
    • 1x .22 cal HD Rimfire
    • 6x .22 cal LT Rimfire
    • 6x 9mm LT Pistol
    • LT Extension Tube
  • End Caps:
    • 1x .22 cal LT Flash Reducer
    • 1x 9mm LT Flash Reducer
  • Mounts:
    • 1x 1/2x28 Thread Mount

With this build I can suppress all of my rimfire rifles and pistols plus anything in 5.7x28mm. It’s also a Mission Configurable 9mm pistol and PCC suppressor that’s capable of being run in a full configuration for training on the shooting range and a short configuration for concealed carry. It’s so lightweight that it doesn’t need a booster!