REASONS TO BUY
High output
Great in cold weather
Solid lid attachment
Incredibly quick to boil
REASONS TO AVOID
Easily can get burned
Particularly heavy
Lacks versatility
MSR Reactor Review
If you’re headed to cold and high places, this integrated canister stove is a trustworthy team member for boiling water and melting snow
Credit: Zach Lovell
By Zach Lovell ⋅ Review Editor ⋅ October 29, 2025
Contributions From: Ian McEleney & Jessica Haist
RELATED: The Best Backpacking Stoves of 2026
Our Verdict
Should you find yourself camping or bivouacking in inhospitable settings, the MSR Reactor should be at your side. This powerful stove has rightfully become a crowd favorite for extreme cold and high altitude hiking, skiing, or climbing. With a top-tier radiant burner and an effective integrated pot, the Reactor boasts best-in-class heat transfer, with excellent wind resistance and particularly fast snow melting if needing to make water. Serious adventurers will greatly appreciate its heat output and lid security when camping in the wildest of places.
Compare to Similar Products
 This Product
MSR Reactor | |||||
|---|---|---|---|---|---|
| Awards |  Best Overall Backpacking Stove |  Best for Lightweight Simmering |  Excellent Affordability | Best on a Tight Budget | |
| Price | $270 List Check Amazon (on sale!) | $70 List Check Price at REI | $85 List Check Price at REI | $50 List Check Price at Amazon | $17.00 List Check Price at Amazon |
Overall Score  |
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| Star Rating | |||||
| Bottom Line | If you’re headed to cold and high places, this integrated canister stove is a trustworthy team member for boiling water and melting snow | This versatile option is one of our favorite small canister stoves, providing the best performance for most camping needs | This stove is a trustworthy companion for simmering-intensive meals in the backcountry | This lightweight option offers excellent simmering capabilities in an impressively low-priced package; we only wish it included a pot and lid | A shockingly small, ultra-lightweight, and straightforward backpacking stove at an impressively low price |
| Rating Categories | MSR Reactor | Soto Windmaster | MSR PocketRocket Deluxe | Soto Amicus | BRS-3000T |
| Fuel Efficiency (25%) | |||||
| Weight (25%) | |||||
| Simmering Ability (15%) | |||||
| Ease of Use (15%) | |||||
| Wind Resistance (15%) | |||||
| Boil Time (5%) | |||||
| Specifications | MSR Reactor | Soto Windmaster | MSR PocketRocket Deluxe | Soto Amicus | BRS-3000T |
| Type | Integrated canister | Small canister | Small Canister | Small canister | Small canister |
| Fuel Type | Isobutane | Isobutane | Isobutane | Isobutane | Isobutane |
| Boil Time .5 liters | 1 min 59 sec | 2 min 27 sec | 3 min 24 sec | 3 min 41 sec | 3 min 8 sec |
| Measured Weight | 15.1 oz | 3.8 oz | 3.3 oz | 3.6 oz | 1.4 oz |
| Measured Weight w/ Stove, Pot, Lid, and Bag | 15.1 oz | 6.8 oz | 6.3 oz | 6.6 oz | 4.4 oz |
| Additional Included Items | 1L pot, canister stand, plastic cup | Stuff sack, pot support | Stuff sack | Stuff sack | Stuff sack |
| Piezo Igniter | No | Yes | Yes | Yes | No |
| Dimensions | 4.2" x 7" | 4.7" x 3.9" x 3.6" | 3.3" x 2.2" x 1.8" | 3.9" × 0.7" × 6.5" | 2" x 1.8" x 3.2" |
Our Analysis and Test Results
MSR really hit the nail on the head when they named this stove the Reactor. From the moment you fire up the stove, you'll experience lightning-fast boil times and faster snow melt than any other option. This model is heavy, but winter camping and high-altitude adventuring sometimes require foregoing the lightest equipment for better performance.
For adventurous camping or bivying, the Reactor is a great tool for melting snow and boiling water. We loved testing this stove in places like this. Credit: Zach Lovell
Fuel Efficiency
This stove isn't quite as fuel-efficient as others we tested, but given how much heat it produces and how quickly it melts snow, some will find its fuel efficiency just fine. For wintry trips, we've found that we aren't always counting grams when it comes to something as essential as a stove system, and extra fuel is a must-have in such environments, regardless of efficiency.
The Reactor burns about .25 ounces of fuel to raise .5 liters of water to a boil, which we confirmed multiple times in lab testing. In the field, we found similar results, but as we got to higher altitudes, its efficiency remained stable. While other models began to decrease in fuel efficiency in colder and higher environments, the Reactor kept purring along. For shorter trips or on-the-go missions from basecamp, this stove will need more fuel than others, but for its intended uses (serious mountain adventures), you're likely to be happy with its heat output and rapid boil times.
The Reactor may not have the best fuel-per-boil score, but it is undoubtedly lightning fast, whether raising water temperature or melting snow. Credit: Zach Lovell
Weight
This burly stove was never designed to be a featherweight option for thru-hiking in temperate climates. It was meant to be trusted when your life depends on a functional stove, and as such, it's a heavier-duty model that scored lower for its weight.
At a chunky 15.1 ounces, this is a fairly heavy stove for everyday use. Fortunately, our whole testing team found that its heavier weight offered better durability and better performance in extreme conditions. MSR also did a great job making this option fairly packable, with the burner fitting inside the pot easily, along with a small can of isobutane.
No doubt about it, the Reactor is quite hefty. However, that weight translates to decent durability and cold-weather performance. Credit: Zach Lovell
Simmering Ability
While there are several stoves that are only meant for boiling water, the Reactor is truly the example of a stove that is either on or off. Yes, you can certainly keep a pot or skillet higher above the radiant burner, but its heat output will remain relatively high.
The reason this stove is so ideal for cold and windy places is largely due to how hot it gets. Unfortunately, this creates a necessary trade-off: reduced simmering capabilities. We've found that expeditions are best served by bringing multiple stoves and were happy with the Reactor as the on-route or “mission” stove, while we had a more versatile stove at basecamp. Alternatively, for adventures closer to home, we were happy to use the Reactor for freeze-dried dinners and breakfasts.
Keep your meals to boil-only with the Reactor, as its simmering capabilities are low. Credit: Zach Lovell
Wind Resistance
The Reactor really shines in windy environments, which is very common when camping in more exposed places. Our team has collectively been using some version of the Reactor for years and we've grown to love its dependability at exposed bivouacs and tent sites.
Throughout testing, we found a very minor decrease in performance when comparing the Reactor's fuel efficiency and boil times between exposed and sheltered locations. Its integrated pot sculpts the top of the radiant burner very well, offering some protection from the elements. However, we attribute the majority of its wind resistance to its sheer heat output, with a burner several times larger than some of the competition.
Camping on a glacier is generally going to be windy for at least some parts of every day, and the Reactor handled that breeze very well. Credit: Zach Lovell
Ease Of Use
While all isobutane stoves offer a similarly simple experience, the Reactor was trickier to use because of its more exposed metal, making it easier to get burned. While other options use neoprene or some sort of cozy pot wrap, this option's bare-bones design requires the utmost attention to your puffy jackets and bare skin.
In addition to the exposed metal, the Reactor has one crucial design setback: its pot doesn't lock to the burner unit. While many models don't have a burner lock, the Reactor was designed for use in unconventional camp locations, such as a rocky ridge or a glacier, where uneven ground is common, so it would be nice if it locked on.
While we loved this radiant burner, we wish there were a way to lock it to the pot. Credit: Zach Lovell
We also wish that a cold-weather stove like this had a larger valve control for gloved hands. While these gripes were shared across our review team, we were still able to make this stove work well where it counted, and MSR nailed the partially integrated lid, which has the best locking system of any integrated canister in our review.
The lid/handle combo locks securely on top of the Reactor's pot, which is the best system we've seen yet for a lid closure. Credit: Zach Lovell
Should You Buy the MSR Reactor?
If you need the highest-powered integrated canister stove available, look no further. This thing runs hot no matter what, it's fairly packable, and is wind's formidable opponent. While it isn't as versatile as some of the competition, adventure-seekers who need something trustworthy in extreme environments will be happy with the Reactor's performance when their survival depends on it. If you just take a few casual low-altitude backpacking trips a year, we'd steer you in another direction.
What Other Backpacking Stoves Should You Consider?
If you're needing something that can be used year-round and offers a more user-friendly experience, consider the MSR Windburner, which many of us consider to simply be a lighter-duty Reactor. For a stove that's better suited for a basecamp setup, the MSR XGK EX is a fantastic liquid fuel model that still boasts top-notch wind resistance and reliability. If you're a casual backpacker and want an integrated canister stove, but are looking for something a little more all-around, check out the JetBoil MiniMo.
—Zach Lovell, Ian McEleney & Jessica Haist
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