JK Armament isn’t the same company they were just a year ago. If you know them from their Form 1 solvent traps or from the last few years of predominately machined aluminum, modular, inexpensive suppressors, it’s time to revisit the brand. JK’s PRO-KOR line of 3D-printed (DMLS), low-backpressure suppressors is cutting edge. They perform with the best in the industry and JK makes ’em in-house, which is rare in the 3D-printed silencer game.
Ultimately, though, we’re here not for the brand name or for who owns the machine that makes the silencer, we’re here for the performance. I’m here to tell you that the PRO-KOR .30 Ti performs.
This is where it all starts. That’s the PRO-KOR blast baffle design. Thick and durable around the bore, and clearly we’re going for lots of gas disruption, control, and redirection including sending some of the gas down separate channels along the circumference.
The business end of the suppressor tells the same tale, with circumferential vents corresponding to the ones in the blast baffle, additional vents on the face of the front cap, plus, of course, the .30 caliber bore itself exiting into a four-prong flash hider design.
All of these features take advantage of the DMLS additive manufacturing process to create a complex internal structure that couldn’t be made via traditional machining. JK’s design is intended to deliver reduced backpressure (a high-flow silencer design) along with top-tier sound suppression performance and excellent durability.
Another benefit of additive manufacturing is that the end result is a single, monolithic piece of material with an incredibly uniform grain structure (apparently even more uniform than a forging or billet). No welds, no joints, no inclusions, hard spots, voids, etc. The industry is proving every day that not only can “3D printing” produce complex structures that machining can’t, but that the resulting product is also stronger with a much lower defect rate.
JK’s QA Taper Mount comes pre-installed in the base of the PRO-KOR .30 Ti, and it ships with a War Eagle combination compensator + flash hider + QA mount muzzle device. JK’s muzzle devices are simple, nice, and relatively affordable, plus their Taper Mount is ASR-compatible so it can be used with quite a lot of other brands’ muzzle devices as well.
Should you want to go a different route entirely with your PRO-KOR mounting solution, the base of the silencer is HUB threaded in the “universal” 1.375×24 size, which opens up an entire universe of mounts and muzzle devices.
Instead of a ratcheting system, JK’s muzzle devices employ a taper in front of the threads. I’ve shot a few of their silencers on a lot of their mounts and find it simple and reliable. As always, if you do mix-match materials — e.g. a steel muzzle brake and a titanium mount — I do recommend [carefully] double checking that everything is still tight once you get it hot.
First out of the gate, Dan and I hit the range with the PRO-KOR .30 Ti mounted on the end of a Henry LASR in 300 Blackout. Backpressure is a total non-issue on a lever action rifle, and in many (most) cases a high-flow suppressor on this sort of setup will sound louder to the shooter than a rifle suppressor designed without backpressure reduction in mind. Additionally, high-flow designs are often created with full-power, supersonic ammo in mind and tend to underperform traditional designs when paired with subsonic ammo.
Knowing all this, with subsonic 300 BLK ammo we were even more surprised than we would have otherwise been at just how very quiet the PRO-KOR was and how great, solid, and deep the tone was. In the video embedded at top we just had to shoot the JK can back-to-back with one of the absolute quietest .30 cal suppressors ever made (in particular with subsonic ammo), and boy did it hold its own both in sound suppression and tone.
While on one hand this performance is extremely impressive for a low-backpressure design, on the other hand the PRO-KOR .30 Ti also benefits from a size advantage. This isn’t a small suppressor or, at least for a titanium suppressor, a lightweight one. At 1.72 inches in diameter, 7 inches in length (8 inches with the mount) and 13.1 ounces (14.6 with mount), it’s on the larger and heavier end of the spectrum. Well . . . I’d actually call this dead average historically, but among .30 cal suppressors released in the last couple of years, especially 3D-printed designs, it’s a tad zaftig.
On a 223/5.56 AR-15, the PRO-KOR .30 Ti was also fantastic. Its reduced backpressure design combined with the .30 cal bore delivered a gas-free experience, even on this totally untuned, fully-gassed AR. The gun ran perfectly, ejecting brass as it was designed to and the sound suppression and tone from the .30 Ti was top tier.
As with any titanium suppressor, you don’t want to heat it up past about 750 degrees and continue firing (it may begin to erode). The PRO-KOR is rated for full-auto use and it doesn’t have barrel length restrictions that I’m aware of — 3D printed titanium is super strong! — but on a semi- or full-auto setup just make sure your rate and duration of fire doesn’t overheat the titanium.
Quick hydration break! Before I melted in the Texas sun I drank a can of Silencer Shop + Echelon’s “Armed Golfer.” There’s no sponsorship or affiliate deal here or anything; I just like the stuff haha. With 100mg of caffeine I can still shoot straight, whereas most energy drinks these days have 200-250mg and I can’t hang with it. Plus there’s magnesium, potassium, Alpha-GPC to temper my retardation . . . it’s legit.
On, then, to a Black Collar Arms Pork Sword SBR chambered in 308 Winchester with a stubby little 10-inch barrel. Firing full power 308 ammo through a 10-inch barrel asks a lot of a suppressor! Pressure and gas volume is real high and there’s a lot of work for a silencer to do.
Again, the new JK can delivered. Suppression performance on this setup was as good as we’ve experienced and, once again, the tone of the PRO-KOR .30 was clean, solid, and deep. It sounds great.
Most suppressor designs favor either subsonic or supersonic ammo (a given suppressor will often be below average on one and above average on the other), semi-auto or manual actions, certain calibers, or certain barrel lengths. The PRO-KOR .30 Ti doesn’t seem to care. It performs way above average across the board.
Rated for .30 caliber magnum cartridges, short barrels, and full-auto fire, but also a great performer on cartridges including subsonic 300 Blackout and 223/5.56, one PRO-KOR .30 Ti can provide top-tier suppression for most of the rifles in most of our safes. Thanks to its HUB-threaded base, it’s also easy to move from gun-to-gun and is probably compatible with your favorite mounting system.
PEW Science’s test of the JK Armament PRO-KOR 5.56K placed it as the fifth best-performing 5.56 suppressor out of 61 tested. I haven’t seen third-party tests of the PRO-KOR .30 Ti (or 6 Mini or 9K) yet, but I know darn well from my time on the range with it that it’s a top performer like the 5.56K is.
If your opinion of JK Armament suppressors doesn’t include their new PRO-KOR line, it’s time to revisit the brand.
Specifications: JK Armament PRO-KOR .30 Ti
| Length: | 8″ |
| Length No Mount: | 7″ |
| Weight: | 14.6oz |
| Weight No Mount | 13.1oz |
| Diameter: | 1.72” |
| Suppressor Material: | Ti-6AL-4V Titanium (Grade 5) |
| Mount Material: | Ti-6AL-4V Titanium (Grade 5) |
| Coating: | Armor Black or FDE Cerakote |
| Full Auto Rated | Yes |
| MSRP | $1,095 |