5 Best Lights for HK USP 45

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Hey there, I’m an experienced marksman who’s spent years testing various firearms and accessories, meticulously weighing their pros and cons. 

My hands-on experience with the HK USP 45 has given me deep insights into what makes a firearm not just good but exceptional.

When choosing the perfect light to pair with your HK USP 45, I’ve sifted through a sea of options to find what truly stands out. The winner? 

The Streamlight TLR-7A Flex. My aim here is simple: to give you straightforward, reliable advice so you can make the best choice for your firearm.

Top 5 Best Lights for HK USP 45.

Best HK USP 45 LightsCategoryPrice
Streamlight TLR-7A FlexBest Option$121.63
Streamlight TLR-1 HLSolid Battery Life$141.38
Surefire X300UPremium Option$288.00
Olight PL-3 ValkyrieGreat Value for Money$79.99
Olight PL-Mini 2Compact Light$89.95

Top 5 Best HK USP 45 Lights

1. Streamlight TLR-7A Flex – Best Option

A compact, high-performing light that sits flush with the HK USP 45’s muzzle and adds minimal weight.

Illumination Range: If you’ve ever been in a low-light scenario, you know how crucial visibility is. This light really impressed me by illuminating up to 40 yards ahead. 

For night shooting, search missions, or personal defense, the Streamlight TLR-7A Flex ensures you can see what’s happening around you. It’s like having a mini-sun at the end of your barrel.

Light Weight: Adding only 2.4 ounces to your set-up is almost like adding nothing at all. Trust me, those extra ounces can make a difference in a long shooting session or in high-stress situations. 

This lightweight design runs on just a single CR123A battery, another perk if you want to keep things simple and efficient.

Slim Profile: A lot of lights stick out like sore thumbs and can snag on holsters or clothing. The slim profile of this light fits beautifully below the trigger guard. 

It’s streamlined, slick, and, well, just makes your HK USP 45 look cooler.

Ambi Controls: Are you a lefty? Or a righty? Doesn’t matter. The ambidextrous control features of this light work seamlessly for both. 

If I could ask for one improvement, it’d be a slightly better toggle switch reach. But overall, flipping this light on and off is a cinch.

Battery Life and Output: The Streamlight TLR-7A Flex boasts 500 lumens and 5000 candelas while running on a single CR123A battery. It’s got a whopping 50,000-hour life. That’s a whole lot of brightness for a little guy.

Why I Love It: This light ticks all the boxes: it’s light, it’s bright, and it’s efficient. It doesn’t just meet expectations; it exceeds them. And for an experienced shooter, that’s what really counts.

My Experience 

I mounted this light and took it for a spin in various conditions. It never failed to provide crisp, clear lighting. The flush fit with the muzzle means no awkward protrusions, making handling and aiming feel natural.


  • Exceptional illumination range
  • Extremely lightweight
  • Slim and sleek design
  • Long battery life
  • Ambidextrous controls


  • Toggle switch could have better reach

2. Streamlight TLR-1 HL – Solid Battery Life

The go-to duty-grade light for law enforcement, boasting 1000 lumens and easy operational features.

Brighter Than Ever: Okay, this light is a powerhouse. The HL version brings a massive upgrade in the illumination department, with a staggering 1000 lumens. 

During my field tests, it was almost like turning night into day. This light will give you an edge in any low-light situation, ensuring that you can clearly see and identify your target.

Wide Illumination: The Streamlight TLR-1 HL doesn’t force you to point your muzzle directly at whatever you’re trying to look at. 

The wide beam pattern is great for scanning areas without making you feel restricted. So, when I was running search and ID drills, this feature made a significant difference.

User-Friendly Toggle Switch: Let’s talk ease of use. The toggle switch is perfectly designed to fit around the larger HK USP trigger guard. 

This meant smooth sailing for both one-handed and two-handed operations during my field tests. These little details elevate a good experience to a great one.

Strobe Mode: The addition of a strobe mode is quite useful for disorienting threats in low-light situations. A simple double-tap activates this feature. 

I experimented with it on the field, and let me tell you, it’s effective for gaining the upper hand.

Why I Love It: The Streamlight TLR-1 HL goes above and beyond when it comes to performance, usability, and tactical advantages. It’s a robust, dependable light that makes your HK USP 45 even more of a standout.

My Experience 

From the moment I attached this light, it felt like an extension of the gun itself. Whether I was navigating through low-light environments or practicing quick target acquisition, this light was a 



  • Incredible brightness
  • Wide beam coverage
  • Easy-to-use toggle switch
  • Cost-saving serviceable lens
  • Effective strobe mode


  • Slightly heavier due to added features

3. Surefire X300U – Premium Light

A rock-solid, high-performing light that beautifully complements the HK USP, especially the Expert 9mm long slide.

Balanced Throw & Spill: First, this gadget’s lighting is exceptional. The TIR lens offers a balanced throw and spill, almost akin to the TLR-1. 

During my field tests, it illuminated far and wide, making target identification straightforward in low-light conditions. It’s not just about the light’s intensity but also the quality of illumination it provides.

Slide Always In Battery: One unique feature I came across is the extra bezel length over the muzzle. What does this do? It prevents the slide from getting out of battery during close-contact situations. 

This feature can also serve as a striking device if needed, adding to the light’s versatility.

Built to Last: When we talk about durability, the X300U is up there. Made from mil-spec grade aluminum, this housing is tough as nails.

It safeguards the electronic components inside from sharp recoil impulse, drops, and daily wear and tear.

Why I Love It: It’s the balance of things, strong light output, versatile features, and bulletproof durability that make the Surefire X300U a keeper.

My Experience 

The light blended perfectly with my HK USP Expert 9mm. It felt rugged, durable, and, most importantly, reliable during various field scenarios. From low-light shooting to indoor clearing, it did the job well.


  • Exceptional light quality
  • The slide stays in battery
  • Easy rail mounting
  • Durable build
  • Optional DG switches for easy access


  • Slightly heavier than some competitors

4. Olight PL-3 Valkyrie – Good Value

OLIGHT WML offers blinding brightness and robustness, making it a versatile choice for both indoor and outdoor shooting scenarios.

Huge Performance: This light doesn’t mess around when it comes to luminosity. With a high mode of 1,300 lumens, it’s a beast. 

During my tests, the light could reach up to 225 meters; that’s way more than most typical engagement distances. 

On the flip side, its low mode of 200 lumens also makes it versatile for indoor use, so you’re not blinded by the reflection off the walls.

Reliable and Sturdy: I’ve got to hand it to OLIGHT for making a light that’s sturdy as can be. The setscrew is such a simple yet impactful feature, adding to the light’s reliability and toughness. 

Ambidextrous Switches: Nothing irks me more than a light that forgets about left-handed shooters.

This light contains a dual-mode setting switch and ambidextrous controls for momentary-on, constant-on, and strobe settings, all accessible by either hand. This inclusiveness won me over.

Why I Love It: What’s not to love? It’s like OLIGHT looked at every issue shooters usually have with weapon lights and decided to resolve them all in one go. The versatility and the attention to detail are just top-notch.

My Experience 

My HK USP 45 and this light are like a match made in heaven. I tested it out during some nighttime shooting and also in a controlled indoor environment. 

The light’s versatile lumen settings came in handy, and the sturdy build reassured me every step of the way.


  • Extremely bright at 1,300 lumens
  • Robust setscrew for added reliability
  • Ambidextrous switches
  • Versatile for both indoor and outdoor use


  • Could be a bit too bright for some indoor scenarios

5. Olight PL Mini-2 – Compact Option

PL-MINI 2 is a compact, lightweight gem that brings out big numbers in brightness and ease of use; ideal for concealed carry.

Huge Performance: Don’t let the word ‘mini’ in the PL-MINI 2 mislead you. We’re talking 600 lumens and a 100-meter throw. 

That’s on par with some of the mid-sized weapon lights out there. In my field tests, this light outperformed its small size in all the right ways. It lit up the target and the surroundings but didn’t overdo it, a balanced act that’s hard to find in a compact light.

Convenient Magnetic Charging: What’s super cool here is the magnetic USB charging system. I didn’t have to remove batteries or fumble with any ports. 

Slap on the magnetic connector, and you’re good to go. Believe me, it’s a refreshing change from the regular USB port drama.

Easy-to-Use Switches: I appreciate simplicity when it’s crunch time. The switches on the PL-MINI 2 are super straightforward; press down quickly for constant on/off or hold for momentary-on. No complicated sequences, and no fuss.

Lithium Polymer Battery: The built-in lithium polymer battery is a powerhouse. 

It held up well throughout my tests and kept the light running without any hitches. And of course, charging it through the magnetic port was a breeze.

Why I Love It: The PL-MINI 2 is like that scrappy player on the team who doesn’t look like much but surprises you at every turn. From its luminosity to its ease of use, it’s a winner all around.

My Experience 

Let me tell you, pairing this with my HK USP 45 felt like I was completing a puzzle. The quick attach system made it child’s play to install, and it stayed put, even during rapid fire.


  • Super bright for its size
  • Magnetic USB charging is a dream
  • Quick attach/release system is solid and fast
  • Simple switch operation
  • Reliable built-in battery


  • Might not be bright enough for some outdoor applications

Final Verdict

After extensive testing and reviewing various lights for the HK USP 45, I can confidently say the Streamlight TLR-7A Flex comes out on top. 

While each light reviewed in the article has its unique attributes, the TLR-7A Flex stands out in terms of reliability, durability, and seamless integration with the HK USP 45. 

Remember, a light is not just an accessory; it’s an integral part of your firearm setup that can make or break your shooting experience. 

Your choice needs to be as reliable as the HK USP 45 itself, and in that regard, the TLR-7A Flex shines the brightest. 


Is the USP 45 good for concealed carry?

Yes, the Heckler & Koch USP .45 Compact is excellent for concealed carry, offering a balanced size, weight, and control.

What lights fit the HK USP?

Several lights fit the HK USP, including the Streamlight TLR-7A Flex, TLR-1 HL, and Surefire X300U, among others.

How many lumens should a pistol light be?

Ideally, a pistol light should have at least 600 lumens and over 15,000 candela for optimal performance.

What does USP stand for pistol?

USP stands for Universelle Selbstladepistole, which translates to “universal self-loading pistol.” It was developed in Germany by Heckler & Koch.

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I quit my job as a high-powered lawyer to pursue the outdoors. I spend most of my time fishing and hunting but am also an avid shooter with two years experience writing about firearms related topics.