Finding a solid Glock 17 Surefire X300 holster shouldn't be a massive headache, but with how many options are out there, it's easy to get overwhelmed by the sheer volume of plastic and kydex. Let's be real: if you've chosen this specific setup, you're already leaning toward one of the most reliable combinations in the history of handguns. The Glock 17 is the gold standard for a full-sized duty pistol, and the Surefire X300 is basically the industry benchmark for what a weapon light should be. Together, they're a powerhouse, but they're also a bit of a beast to carry comfortably.
The X300 isn't exactly a small light. It sticks out past the muzzle of a Glock 17, which means your holster needs to account for that extra length. You can't just shove this into any old bucket and hope for the best. You need something that respects the dimensions of the light while keeping the pistol secure enough that it's not rattling around every time you take a step.
Why the Light-Bearing Setup Changes Everything
When you add a light like the Surefire X300 to your G17, the mechanics of how the holster works actually shift. In a standard holster, the retention—that satisfying "click" you hear when you holster the gun—usually happens around the trigger guard. However, when you add a light, that trigger guard is now mostly covered or blocked by the light body.
Because of this, almost every Glock 17 Surefire X300 holster is going to index off the light itself. This is a double-edged sword. On one hand, it's great because a well-made holster will grip that X300 like a vice. On the other hand, it means if you decide to take the light off for some reason, your holster is basically useless. It's a commitment, but honestly, once you've gotten used to having 1,000 lumens at your fingertips, you probably won't want to go back to a "naked" slide anyway.
Carrying the Beast: IWB vs. OWB
Deciding how you're going to carry this setup is the next big hurdle. Carrying a full-sized Glock 17 with an X300 inside the waistband (IWB) is a bold move. I won't lie to you—it's a lot of gun. Because the X300 is longer than the slide, it creates a longer "lever" inside your pants. This can actually be a benefit for some people because it prevents the grip of the gun from tipping outward over your belt line, but for others, it just feels like you've got a 2x4 shoved down your leg.
If you're going IWB, you absolutely have to look for a holster with a "wing" or a "claw." These little plastic attachments push against the back of your belt, rotating the grip of the Glock 17 into your body. Without it, that full-sized grip is going to print through your shirt like crazy.
On the flip side, outside the waistband (OWB) is where the G17 and X300 combo really shines. This is the classic "duty" setup. Whether you're at the range, working a security detail, or just hiking in the woods, an OWB Glock 17 Surefire X300 holster offers a level of comfort you just can't get with IWB. You've got more room to breathe, and the weight of the setup is distributed more evenly across your hip.
The Materials Matter More Than You Think
You're going to see a lot of talk about Kydex, Boltaron, and leather. Let's skip the fluff: for a light-bearing setup, Kydex or a high-quality thermoplastic is almost always the way to go. Leather is great for a vintage revolver or a subcompact, but leather holsters for a G17 with an X300 tend to get "mushy" over time.
Because the light adds so much bulk, a leather holster has to be reinforced heavily to keep from collapsing. Kydex stays rigid. It doesn't care if it's raining, it doesn't care if it's 100 degrees out, and it's going to give you that consistent draw every single time. Plus, it's much easier to clean the carbon buildup from the X300 off a Kydex shell than it is to get it out of leather.
Dealing with the "Gap"
One thing people don't talk about enough with a Glock 17 Surefire X300 holster is the gap around the trigger guard. Because the holster has to be wide enough to let the light pass through, there's naturally going to be a bit of a space near the trigger.
A high-quality manufacturer will taper this as much as possible to prevent anything—like a stray piece of clothing or a finger—from getting inside that gap. When you're shopping around, look at photos of the holster from the top down. If you can see the entire trigger clearly, that's a red flag. You want a holster that keeps that area as protected as possible while still allowing the light to slide in and out smoothly.
Retention Levels for Duty and Range
If you're looking at this setup for professional use, you're probably thinking about active retention. Safariland is usually the big name here, and for good reason. Their ALS (Automatic Locking System) is pretty much the gold standard for a Glock 17 Surefire X300 holster. It lets you get a natural grip and release the gun with a simple thumb movement.
However, if you're just using this for a "battle belt" or a range rig, you might not need Level 2 or Level 3 retention. A simple friction-fit holster is much faster and less complicated. Just make sure the retention is adjustable. Most Kydex holsters have a couple of screws near the light channel that let you tighten or loosen the "bite" the holster has on the gun. You want it tight enough that it won't fall out if you have to run, but loose enough that you aren't fighting the plastic during your draw.
Don't Forget the Belt
I see people spend $600 on a Glock, $300 on a Surefire, $100 on a holster, and then try to hold it all up with a $10 belt they bought at a department store. Please, don't be that person.
A G17 with an X300 and a full mag of 17+1 rounds is heavy. If your belt is flimsy, the holster is going to sag, the grip is going to tilt out, and you're going to be miserable within an hour. A dedicated "gun belt" with some internal stiffening will make the whole setup feel significantly lighter. It sounds like marketing hype, but a stiff belt is the difference between a setup you can wear all day and one you want to take off after twenty minutes.
Optics and Threaded Barrels
We're living in the golden age of pistol red dots. Even if you don't have an optic on your G17 right now, it's a smart move to get a Glock 17 Surefire X300 holster that is "optic cut." Most modern holsters come this way by default now, but it's always worth double-checking. It doesn't hurt anything to have that extra space if you don't have a dot, but it definitely hurts if you buy a dot later and realize your holster won't fit anymore.
The same goes for threaded barrels or compensators. Since the X300 is already longer than the G17 slide, many holsters leave the bottom open anyway. This is great because it lets dirt and lint fall out the bottom instead of collecting around your light lens, and it also means if you decide to throw a threaded barrel on there later, you won't have to take a Dremel tool to your expensive holster.
Final Thoughts
At the end of the day, your Glock 17 Surefire X300 holster is the bridge between you and your tool. It needs to be something you trust implicitly. Whether you go with a big-name brand like Safariland or Tier 1, or a smaller custom shop, the priorities remain the same: safety, comfort, and accessibility.
The G17 and X300 is a bulky, unapologetic setup meant for serious work. It's not the easiest thing to carry, but with the right holster and a bit of patience, it becomes a natural extension of your kit. Take the time to find the right fit, break it in with some dry fire practice, and you'll quickly see why this combo is so highly regarded. It might take a few tries to find the "perfect" one, but once you do, you'll never look back.