Hera Arms Tiarii turns a pistol into a carbine

The Tiarii disassembled.  (Photo credit: Hera Arms)

The Tiarii disassembled. (Photo credit: Hera Arms)

I was setting up guns at the range last weekend when Jacob, my aide with all things tactical, brought over the strangest looking rig I’d ever seen.  It looked a lot like a space-age take on the old Sterling submachine gun.  The exterior was all anodized aluminum and picatinny rail, and buried beneath the bulk was the operating mechanism, a Glock 19.

The Glock I understood.  The rest was new to me.  I’d seen these before, but never in person.  The Hera Arms Tiarii is a very complex device with a very simple purpose.  The external frame adds usable tactical space to what is an otherwise limited platform.  In other words, it gives your pistol the useable surface area and advantages of a carbine.  And it does it instantly.

The Tiarii for a Glock 19.  (Photo by David Higginbotham)

The Tiarii for a Glock 19. (Photo by David Higginbotham)

The Tiarii slides open to accept a pistol.  There are specific versions made for a variety of service pistols.  The objective is allow one gun to serve multiple roles.  A sidearm that is very useful in close quarters can be inserted in the Tiarii during a longer stand-off situation, allowing the operator the advantage of optics, a stock, lights, forend grips, etc.

Simply insert the gun in the frame, slide the front and back halves together (an action that is guided by aluminum rails), and tighten down a knurled nob.  Your pistol is now a carbine.

With rails on the top, bottom and sides, there’s ample room for absolutely anything you might want to add on.  On the right side of the pistol, milled clearance ensure that the Tiarii won’t disrupt ejection.  A charging handle on the left side of the Tiarii operates a lever inside that catches the frame, not the barrel, of the pistol.  The charging handle is incredibly easy to use and the mechanical advantage is actually an improvement over traditional pistol/slide operations.

The charging handle is easy to use.  (Photo by David Higginbotham)

The charging handle is easy to use. (Photo by David Higginbotham)

 The logical benefits

Besides the obvious advantage of extra rail, the Tiarii offers some useful ergonomics.  The extra length on the fore-end allows you more grip.  The extra stability afforded by the Tiarii, in combination with the added mass, really stabilizes the pistol.  Repeat shots are easier than they are with a naked Glock.

Also, an angled fore grip, like the Magpul Angled Fore Grip, is helpful for stabilizing the fore-end and perfectly legal.  A vertical fore grip is not legal, according to the ATF.  The language here is very important and it seems to be open to some interpretation (much like the way SIG’s new arm braces on AR pistols managed to gain ATF approval).  The angled fore grip is angled.  My interpretation is that he ATF’s original language wasn’t broad enough to also restrict angles.  Some have actually asked the ATF, and this letter is an example of the ATF’s response, though it doesn’t explain why it is legal, exactly.  If you want to be safe, write and ask.

A stock on the back end stabilizes the gun even more, but that does require some paperwork from the ATF.  Add a stock and this becomes an short barreled rifle.  Don’t do it unless you get the clearance and stamps.

One thing the ATF isn’t concerned with is the increase in the distance between the sights.  A good pair of back-up sights is a must, though most will simply want to run the Tiarii with a red dot on top, which is even faster.

The forend is allows for more grip area.  (Photo by David Higginbotham)

The forend is allows for more grip area. (Photo by David Higginbotham)

 Shooting the Tiarii

As we had just picked up the Tiarii, we haven’t filed any paperwork for it, so we left it without the stock.  Shooting it this way is easy enough. I find it a bit more awkward than shooting a pistol and much more awkward than shooting an actual carbine with a stock, but if you need the extra weight on the gun, the Tiarii does a great job of carrying it.

But it really is begging for a stock.  Recoil from the Glock 19 is manageable to begin with, so that’s not really an issue.  It has more to do with how you hold this contraption.  You can’t extend it like you would a pistol, as you front hand won’t have anywhere to go.  The Tiarii isn’t balanced like a pistol, so any two handed pistol grip fails to hold up the front end.

Add a stock, and this is an SBR.  (Photo by David Higginbotham)

Add a stock, and this is an SBR. (Photo by David Higginbotham)

You have to bend the elbow of your shooting hand and pull it in a bit, like you would if you were shouldering a rifle.  That feels strange at first.  Once you habituate to it, shooting the Tiarii is actually measurably faster than shooting the pistol alone.

 The drawbacks

You will have to practice to get comfortable with the rig.  Is that really a drawback?  Only when ammo is in short supply.

You may need to file for ATF paperwork, which is a hassle.  You have to apply and you have to wait.  After that, though, the benefit of the stock (especially one that will fold) will turn this from a curiosity to a very useful pack mule.

It gets dirty.  Because the fore-end is much longer than the barrel of the Glock 19, all of that soot and grime is deposited inside the Tiarii.  It functions as a practical flash hider, but it gets really dirty.  Yet that grime is easy enough to clean and it isn’t going to alter the function of the gun at all.

The barrel is down there, somewhere.  (Photo by David Higginbotham)

The barrel is down there, somewhere. (Photo by David Higginbotham)

Is there anything else?  Availability maybe.  As these are made in Germany, and made for very specific pistols, finding one in stock stateside can be difficult, which also affects price.  I’ve seen some listed in the mid $400s.  This one was acquired second hand for less, but not much less.

Final thoughts

As I see it, there is a lingering question.  Is it something you need?  If you need all of the extra benefits of added tactical gear, than this is a killer rig.  If you would rather simply buy another gun and have a dedicated carbine rig and keep your pistol on your hip, than this is superfluous.

Yet the Tiarii is compelling.  The one thing I’ve noticed is that anyone who sees it instantly asks, “What is that?”  And after the long and convoluted explanation, shooting with the Tiarii will make even the most dubious skeptic (like me) a believer.