If you're looking for a Glock 19 holster with mag holder, you're likely trying to streamline your everyday carry setup into a single, cohesive unit. It's one of those gear upgrades that just makes sense once you actually try it out. Instead of having a holster on one hip and a spare magazine pouch cluttering up your other side—or worse, just floating around in a pocket—everything sits in one place. It keeps your waistline symmetrical and, honestly, it just makes getting dressed in the morning a lot faster.
The Glock 19 is arguably the most popular carry gun on the planet for a reason. It's that "Goldilocks" size—not too big to hide, but not so small that it's a pain to shoot. But even with 15 rounds in the tank, most of us feel a lot better having a backup. Mechanical failures happen, and magazines are usually the culprit. Having that extra mag right there next to the gun isn't just about extra rounds; it's about peace of mind.
Why Combine the Holster and Mag Holder?
For a long time, the standard way to carry was a holster at the 3 or 4 o'clock position and a mag carrier at 9 o'clock. It works, but it can feel like you're wearing a utility belt. When you switch to a Glock 19 holster with mag holder—specifically the appendix "sidecar" style—the weight distribution changes completely.
By centering the weight of the gun and the spare magazine across the front of your body, you actually create a more balanced feel. A loaded Glock 19 isn't exactly light, and having that extra weight on the opposite side of the holster helps keep your belt from sagging to one side. It also helps with concealment. It sounds counterintuitive to put more stuff in the front of your pants to hide it better, but the flat surface created by the gun-and-mag combo fills in the gaps and prevents the grip of the pistol from poking out.
The Appendix Carry Advantage
Most people looking for this specific setup are looking at Appendix Inside the Waistband (AIWB) carry. In this world, the "sidecar" style is king. This is where the mag holder is attached directly to the holster body, usually by a flexible hinge, a piece of shock cord, or just a solid piece of Kydex.
The beauty of having your mag right there in the front is speed. Your "work space" for a reload is right in front of your face. You don't have to reach around your hip or fumble behind your back. Your non-dominant hand just drops down, grabs the mag, and brings it straight up into the mag well. It's a very natural, economical movement. Plus, in a defensive situation, it's much easier to protect the front of your body than your sides or back.
Materials Matter More Than You Think
When you're shoving a big piece of plastic and metal down your pants for 12 hours a day, the material of your Glock 19 holster with mag holder matters a lot. You'll mostly see three options: Kydex, leather, and hybrids.
Kydex is the gold standard here. It's tough, it doesn't lose its shape, and it gives you that satisfying "click" when the gun is seated. For a combo rig, Kydex is great because it stays thin. You don't want a bulky setup getting even bulkier. The downside? It's hard plastic. If the edges aren't rounded off well, it can poke you in the thigh or the gut when you sit down.
Leather is incredibly comfortable once it breaks in, but it's rarely used for these all-in-one combo rigs. Leather tends to be thicker and can lose its retention over time. If you do find a leather one, make sure it has a reinforced mouth so it doesn't collapse when you draw the gun.
Hybrids (usually a Kydex shell on a leather or padded backing) try to offer the best of both worlds. They're comfortable against the skin, but they can be a bit wide. For a Glock 19 with an attached mag holder, a hybrid can sometimes take up too much real estate on your belt line, making it hard to find a spot where it doesn't interfere with your belt loops.
Features to Look For
Don't just grab the first Glock 19 holster with mag holder you see on a shelf. There are a few small details that make a massive difference in how much you'll actually enjoy wearing it.
The "Claw" or "Wing"
This is a small plastic piece that sticks out near the trigger guard. It's designed to push against the back of your belt, which leverages the grip of the Glock 19 closer to your body. Without a claw, the grip of the gun likes to tilt outward, creating a noticeable bump under your shirt. With a mag holder attached, the claw is even more important to keep the whole rig tucked in tight.
Adjustable Retention
Every person has a different preference for how "stuck" they want their gun and mag to be. Look for a holster that uses screws to adjust the grip. You want to be able to turn a screw and decide exactly how much force it takes to pull that mag out. Too loose and it might fall out while you're running; too tight and you'll end up pulling your pants up to your armpits trying to reload.
Optics and Light Compatibility
Even if you don't have a red dot or a weapon light on your Glock 19 right now, you might later. Many modern holsters come "optics cut" by default, meaning there's a notch cleared out for a Trijicon RMR or a Holosun. It's worth getting one that's compatible so you don't have to buy a whole new rig if you decide to upgrade your pistol down the line.
Comfort and "The Wedge"
Let's be real: carrying a Glock 19 and a spare mag in the front of your pants isn't always like wearing sweatpants. It can be a bit intrusive. This is where a "wedge" comes in. A wedge is usually a piece of foam or molded plastic on the back of the holster (the side facing your body) near the bottom.
It does two things. First, it pushes the muzzle of the gun away from your body, which naturally tilts the top of the gun into your stomach, aiding concealment. Second, it acts as a cushion. Without it, the bottom edge of the Kydex can dig into your pubic bone or inner thigh when you're driving or sitting at a desk. If your holster doesn't come with one, you can easily DIY one with some heavy-duty Velcro and a yoga block. It sounds silly, but your comfort levels will skyrocket.
Don't Forget the Belt
You can spend $150 on the best Glock 19 holster with mag holder in the world, but if you're wearing a cheap, floppy leather belt, it's going to suck. A combo rig puts a lot of localized weight in one spot. You need a dedicated gun belt—something with a stiff core (like kydex or steel reinforcement) or a heavy-duty nylon webbing. A stiff belt supports the weight and keeps the holster from tilting forward, which is the main cause of "printing" (when people can see the outline of your gun through your clothes).
Training With Your New Setup
Once you get your holster, don't just put it on and head out. Spend some time doing dry-fire practice. Drawing from an appendix rig with an attached mag holder feels different than drawing from the hip.
Practice your reloads. Get used to where that magazine sits. Since it's usually indexed with the bullets facing toward your centerline, your muscle memory needs to get used to that specific grab-and-rotate motion. The more you do it, the more it becomes second nature. You'll find that having the mag in the same spot every single time—regardless of what pants you're wearing—makes your reloads much more consistent.
Final Thoughts
At the end of the day, a Glock 19 holster with mag holder is about efficiency. It's for the person who wants to be prepared but doesn't want to deal with multiple pieces of gear every time they leave the house. It takes the most popular carry gun in the world and pairs it with the one thing you're most likely to need in a pinch: a fresh magazine.
It might take a week or two of adjusting the clips, moving the claw, or adding a foam wedge to find your "sweet spot," but once you find it, it's hard to go back to any other way of carrying. It's compact, it's fast, and it keeps everything you need exactly where you can reach it. Just make sure you invest in a solid belt, do your dry-fire reps, and you'll be good to go.