Squid Industries Tac 21 Review

Squid Industries Tac 21

The Squid Industries Tac 21 is an absolutely awesome mod. it has a nice form factor, a clicky fire button, and it is easy to use. Click the Buy Now button to get this great price.


First Impression out of the Box

DeucesJack:What’s up, everyone? DeucesJack at vapinginsider.com. Today, I got a new dual 21700 200W mod for you. I got the Squid Industries Tac 21. Check out that Falcon Resin tank sitting right on top with that beautiful mesh coil in it. Review coming real soon.

This is a power mode mod and bypass mode mod only. It’s got the same fire button as the double barrel, same type of wattage adjustment. First run had some issues. We’re going to talk about them. But first let me show you the improved run, up close and personal. I’ll see you down low.

What’s In The Box

  • 1 TAC-21 Box Mod
  • 2 18650 Battery Adapters
  • Instructional Manual

Welcome to the down low portion of this video. Today, we’re going to be going over the Squid Industries Tac 21. You can see, I have the black one. I know for a fact it’s also available in grey champagne. Not sure if the stainless is out yet and I’ve heard rumors that an army green one is going to be available. But I’m not sure if that one’s out yet.

Squid Industries Tac 21 Review

Let’s do a quick tour around the box. Right there, we got some Tac 21 branding. Nothing much else going on. Take it out of the sleeve. On the back of the box, pause this if you want to read it. It’s the story about one of the owners of Squid industries, Eric. It’s a great story. I highly recommend you pause it and give it a read. Let’s open up the box, see what we have here. Here is your Tac 21. We’re going to take that out a second and put it on the side. You also get a certification card, right here and you get a Tac 21 user manual in a couple of different languages.

From Top To Bottom

Here is the Tac 21. You’re going to notice right way it’s very similar to the Squid Industries double-barrel which is one of my all-time favorite mods. This is in fact, like the big brother to it. Has the same type of firing button and same type of wattage, up and down switch, same type of engraving over here. Battery doors, different, because this battery door stays on. This one comes off. On the top, same thing going on, same type of situation, small screen, small screen. Lots of similarities, even has the same type of venting in the middle there, that same type of shotgun look. Let’s put the double barrel to the side for now and let’s concentrate on the Tac 21. I just wanted to show you the similarities between the two.

Squid Industries Tac 21 Review

On the top here, we have the top plate being held in place by three star screws. We also have a brass 510 connection here, spring-loaded. I would call it a stiff spring with a short throw. Real nice job on that. You’ll also see, it’s got that same shotgun thing going on around the 510 connection. Good job on that. They took that from the original DB. Really nice and clean looking. You got the small screen over here, again, in keeping with the same tradition as the DB. Not sure if you can see this. You see that part right there? See how it gets raised over here? Right here, see how it’s a little raised up? That’s not a problem, some people might think it’ll be a problem where you’re going to gap but it hasn’t happened on any of my atomizers. This will fit a 28mm tank without any overhang. This is the Vandy Vape triple. Check it out, no overhang. Fits on there beautifully.

Squid Industries Tac 21 Review

Here is your screen. Here is your fire button. Nice, clicky, tactile fire button. To the right, will make the wattage go up. To the left, will make it go down. Squid Industries deeply engraved over here. You can see, I already dinged it up a little bit. Like I tell you all the time, I’m very rough on my mods. Here is your battery venting right here. Nice big venting slot. You can actually see the batteries through it, plenty of venting.

Squid Industries Tac 21 Review

On the back of the mod. You have a little bit of a raised grip over here so you can get your battery door open. You’ll notice, battery door, very, very solid. It does not wiggle at all. Clear battery indicator markings done in white. That’s a pro. Button style, gold-plated contacts over there. If you look inside, you’ll notice we have two 18650 battery adapters so you can run 18650s in it. We’re going to file that to the side for now. Down on the bottom there, we have gold-plated the lever style contacts no battery indicator marking down there. Over here, it looks like we have some sort of serial number. Battery door is very solid, definitely been enjoying it.

Squid Industries Tac 21 Review

This mod will take 2700s without an adapter. You put your negative side up over here. Put your positive side up over here. Snap it down, snap it in, like that. No battery rattle, no nothing with 2700s. Here comes the real test. We got to see if this thing will fit 21700s. These are my Sigelei batteries. These are the biggest 21700s I own. Let’s see if they fit. Put it in, negative side first over here, you’ll see. Fits nice and snug. Put it in positive side first over here, they both fit in there nice and snug. Close the battery cap down, slide it over and it clicks into place. I have no battery rattle, no nothing. This thing is in there solidly.

Menu System

As soon as you put the batteries in, the screen turns on. Now you can see the screen, right here. You’ll notice we have the battery meter over here. Watts here, wattage over here, volts and resistance. Menu system is very simple. 1, 2, clicks and now you’re locked which means you cannot adjust the wattage. See, I’m turning this and now the wattage will not move. In order to unlock it, one, two, now you’re unlocked.

Give it three clicks one two three and now you’re in bypass mode. I never used bypass mode. I know some people are really going to like that. It’s not my thing, I never use it but it’s on this mod just in case you use it. One, two, three, I’m out of bypass mode now. one, two, three, four, now I can flip the screen.

Squid Industries Tac 21 Review

One, two, three, four. Now I can flip it back. Now you’ll notice, I have the Falcon mesh coil on here. It’s a 0.15 coil. It’s reading it at 0.13. This mod is off by about 0.02-0.04 ohms. It’s always going to read it lower in that range. It’s really not that much of an issue that it only fires down to 0.1. It makes it a bigger issue because the resistance reading is off so if you’re at around 0.12, you’re probably not going to be able to fire on this thing. Let me show you what I’m talking about.

Here I have an atomizer ohming out at 0.11 on my DNA Triad, my DNA 250C. So I should be able to fire this hot Sig hades on the Tac 21. Here I go, I put it on the Tac 21 and you’ll notice I’m getting the short message. See that? It won’t fire even though it’s above 0.1 ohm. So what’s happening is this thing isn’t reading as accurately as it should be. That’s a con. It’s not that big of a con for me because I normally don’t vape that low but for a lot of people, that’s going to be a big con.

That’s it. That’s the whole Tac 21. Let’s cut back on top. We got some stuff we’re going to talk about, then we’ll go over cons and pros and then we’re out of here as usual. See you back on top.

General Thoughts

Alright, everyone! We’re back on top with the Squid Industries Tac 21. I don’t know what else to say about the thing. I freaking love this mod. It is absolutely awesome. I love the form factor. I love the heft to it. I love the way it feels in my hand.

Let’s address the elephant in the room though, because the first run did have some issues. 21700s didn’t fit. If you were able to get them in, people were tearing their wraps. Squid Industries, to their credit, stepped up. They provided people with a fix. If they didn’t want to fix it on their own, they offered you to send it back and they would exchange it. So big ups to you, Squid Industries and Eric for doing the right thing and stepping up when you guys know you made a mistake on the first run. I like that. I always believed in what John F Kennedy once said, “A mistake is only a mistake if you refuse to correct it.”

Squid Industries Tac 21 Review

The other problem I have with this mod is the board is off by about 0.02 to 0.04 ohms. Now normally, that wouldn’t be a big deal but it only fires down as low as 0.1 ohms so if you’re running like a 0.12 ohm build, you’re going to have a hard time getting this mod to recognize that. I showed that to you down low. That’s definitely going to be a con. I don’t like that but otherwise, I really don’t vape that low most of the time. Most of the time, I’m in the 0.25 to 0.3 ohm range so it’s not an issue for me but it’s going to be an issue for people out there.

This thing does come in black. I know it comes in gray champagne. I’ve seen on the box that it says stainless steel but I haven’t seen that one yet and I also know there’s a rumor that there’s going to be an army green one soon, so stay tuned for that.

Let’s get into the cons and the pros. We already touched on a few of the cons.


First con’s going to be, it only fires down to 0.1 ohms. That’s an issue for some people. You know, today, the standard is really 0.07, 0.05. That’s what it really should fire down to. I don’t know why they went with the 0.1 ohm limit but it is what it is.

The other con’s going to be it did have issues but they were fixed but I still got to mention that in the cons.

Power mode and bypass mode only, some people are going to be upset that there’s no TC. Some people do like to vape in TC so I’ve got to point it out as a con.

And the other con’s going to be it’s not updatable and that wasn’t an issue on DB because it was a very simple mod and people just used it for what it was, as power mode but now you added some more features to this thing and you want to know something? If it was updatable, you’d be able to fix that 0.1 ohm resistance that you got programmed into it so I kind of wish it was updatable just for that reason. Otherwise, though, nothing that really affects the vape quality of this mod.

This thing, it’s one of my everyday mods I use it all the time. The battery life on it is just fantastic. I get a day and a half at 85W on this thing.

So let’s get into the pros.


First pro is going to be, love the form factor. It’s fantastic. Feels great in the hand. That’s a pro.

Nice finish, we’re going to give them a pro for that.

I’m going to give them a pro on that clicky fire button. I love that fire button, that’s fantastic.

I’m going to give them a pro for adding the bypass mode. I don’t use it but some people will and that’s definitely going to be a pro for them.

The battery door stays on the mod. That’s a pro. Unlike the old DB with a whole battery door comes off, this one doesn’t, pro.

Squid Industries Tac 21 Review

Small and discreet screen right on top there. I like that. That’s a pro.

28mm atomizers with no overhang, pro.

No rattles, this thing doesn’t rattle. It’s solid as it comes. That’s a pro.

Battery life is awesome. We’re giving them a pro for that.

Takes three types of batteries, 21700s, 20700s and 18650s with the included adapter, pro.

We’re going to give them a pro for including the adapters. That’s a pro.

Plenty of venting, you saw it on the sides here, all that venting. That’s always a pro.

Well-built, this thing feels really solid. I’m going to give them a pro for build quality.

Simple menu system, pro.

Easy to use, not a lot of bells and whistles on this thing. Running them power mode or, bypass mode, hit the button. What could be simpler? We’re going to give them a pro for that.

When you hit this thing, when you vape on it, it ramps up quickly no matter what type of build you got in there. I’m going to give them a pro for that.

Spring-loaded brass 510, that’s a pro.

And the last pro I’m going to give them is their awesome customer service. I know Eric, one of the owners of Squid Industries, personally. They have awesome customer service. They’re always willing to work with you no matter what the situation may be. There aren’t a lot of companies out there like that, I got to give them a pro for that.


We’re going to have a link down below to Element Vape. They sent this to me for this review. Shout out to them, they’re an awesome vendor with some awesome pricing and fantastic customer service as well.

We’ll also have a link down below to our forum, vapinginsider.com/forum. Hey, man. Listen, we don’t care who makes it. We don’t care where it’s from. You’re going to get the real deal, the honest scoop here every time. Anybody can make reviews that everybody likes. Those reviewers are a dime a dozen. We give it to you straight here so do us a favor, give us that thumbs up. Hit that sub button. Hit that notification button so you know every time we drop a new review.

We’re going to see you on the next one. You keep living that vape life. We’re out of here, deuces.

Squid Industries Tac 21

The Squid Industries Tac 21 is an absolutely awesome mod. it has a nice form factor, a clicky fire button, and it is easy to use. Click the Buy Now button to get this great price.


Pros & Cons

A note about Pros and Cons. These are my Pros and Cons. They are very subjective. What may be a pro to me could be a con to you and vice versa.

  • form factor
  • Nice finish
  • clicky fire button
  • bypass mode
  • battery door stays on the mod
  • Small and discreet screen
  • 28mm atomizers with no overhang
  • No rattles
  • awesome battery life
  • Takes three types of batteries
  • battery adapters included
  • Plenty of venting
  • Well-built
  • Simple menu system
  • Easy to use
  • ramps up quickly
  • Spring-loaded brass 510
  • awesome customer service

  • nly fires down to 0.1 ohms
  • Power mode and bypass mode only
  • not updatable

  • Dual High-Amp 20700 Batteries – Not Included
  • Optional Dual 18650 Batteries – Requires Battery Sleeve
  • Wattage Output Range: 5-200W
  • Minimum Atomizer Resistance: 0.1ohm
  • Heavy-Duty Stainless Steel Construction
  • Multi-Function Fire Switch – Wattage Adjustments, Power Switch
  • Tactile Firing Button
  • Intuitive Top-Mounted OLED Screen
  • Bottom-Loaded Sliding Battery Door
  • Reverse Polarity Protection
  • Overheat Protection
  • Short Circuit Protection
  • Spring-Loaded Solid Brass 510 Connection

Deuces Jack is a well-known member of the VapingUnderground forums where he quickly became respected for his honest opinions and willingness to help other members. He is now a regular content contributor for Vaping Insider. When he’s not vaping or unboxing the latest products for review, he can be found riding motorcycles close to his home in New York.

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