Umarex Octane Review


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Nobody wants to be ripped off.

And everyone’s afraid of trying new things.

Understanding customer’s thinking, many air gun manufacturers offer up to 1 year warranty for their rifles.

But not so much manufacturers like Umarex offer a generous 3 years limited warranty

So confidence in their products, I have to say.

And the over-expected warranty is not the only thing I love about the Umarex Octane rifle.

In the next 5 minutes, I’m sure you will nod your head and say ” I see what you mean” after reading this detailed review.

Gun Type

Umarex Octane air rifle a gas ram gun. It is powered by ReAxis gas piston technology. Surprisingly, Umarex is the first mainstream air gun manufacturer who actually reverses the direction of the gas ram. They claim that by doing so, you get more power and reliability. We have to see if it works out at the end of this review but first thing first, how ReAxis Gas piston works?

umarex octane air rifle combo review

Basically, ReAxis stands for Reverse Axis. According to Umarex, unlike the nitrogen-filled gas piston, the ReAxis piston is reversed: meaning the gas strut is turned 180 degrees on its axis so the larger mass of the gas strut pushes the piston instead of the rod, thereby, it generates more power, velocity and impact than other gas pistons.

Now we know what ReAxis gas ram is, let’s take a look at its benefits over spring piston. First, you have smoother cocking since it doesn’t have spring torque like metal spring. Second, there is no spring fatigue even if you leave it cocked for hours so you don’t have to worry about the piston wear out over time. Third, ReAxis gas piston is not affected by weather. With the springer, the main spring is lubricated with grease so it becomes harder and tougher when the weather gets cold. ReAxis strut doesn’t have this problem and it functions perfectly in different types of weather. Fourth, ReAxis gas ram allows you to have smoother shooting experience with less recoil compared to spring piston. And finally, it lasts longer than metal spring. In the air gun world it is not uncommon to make spring compression over its standard threshold. This weakens the spring and shortens its life span. However, ReAxis gas piston doesn’t care about compression so you can enjoy long-time shooting with it.

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The caliber (the internal diameter of the barrel, measured in inches) is available in both .177” (4.5 millimeters) and.22” (5.5 millimeter). .22 caliber is the favorite choice for hunters. While the .177 caliber offers more velocity, it usually doesn’t generate enough takedown power to kill an animal in 1 quick, clean shot. Oftentimes, the .177 pellet doesn’t hit the bone and organ, it just goes through the animal’s skin and makes it run off than die instantly. .22 caliber has more knockdown power transferred to target’s body so it’s go-to gun for field hunters and pest eliminator.

The Umarex Octane is a break barrel, single-shot action gun. Break barrel design allows unlimited capacity. You don’t have to worry about shooting capacity when your air gun runs out of power such as CO2 or PCP air guns. Besides, single-shot action gives you control about ammunition you gonna shoot. You will find out what pellet work best for your gun in the shortest amount of time. In addition, single-shot rifle hones your marksmanship skills: You have to aim and shoot carefully because you have only one chance to hit the target before reloading.

This air rifle has rifled steel barrel. Rifled barrel has helical grooves inside it that make bullet spin. Spinning stabilizes pellet, improves accuracy and enhances shooting range.

Umarex Octane incorporates a noise-dampener called SilencAir. It is a non-removable suppressor with five chambers that significantly reduces muzzle noise. SilencAir is engineered specifically for air gun. When the first pellet enters the SilencAir, it pushes air into the airport in the first chamber (called the anterior tube), then pellet pushes the air through the ring and through the airport and out of the second chamber. After that, air is forced out of third, fourth and fifth chamber, lowering the audible report at the muzzle. Therefore, you can enjoy stealth and secretiveness with Umarex Octane in the hunting field.


Umarex Octane Air Rifle

Umarex Octane .22 air gun has an all-weather synthetic stock. Unlike woodstock which is heavy and easily affected by outside condition, synthetic stock works in any weather and doesn’t require any maintenance. It’s very suitable for people who live in cold or humidity place and for shooters who don’t want to bother with stock preservation.

The stock is ambidextrous: It gives the same shooting experience for both left-handed and right-handed shooters. There is no difference whether you are lefty or righty. Besides, it has nice texturing on the forearm and grooves on the grip to prevent slippage from your sweat, enhance stableness when aiming and improves accuracy. Moreover, the stock has rubber buttpad help absorbing recoil, even the ReAxis gas piston has already cut the recoil to the great extent. Last but not least, the stock has thumbhole design that provide more relaxed grip on your wrist by resting the stock on your wrist as opposing to holding it with your arm. Stock with thumbhole is best for varmint shooters and for anyone who spends a lot of time on shooting position like benchrest shooting.


The Umarex Octane uses .177 and .22 pellet corresponding to its 2 types of calibers. .177 is lightweight, popular and easy to find in the store Moreover, .177 pellet is damn cheap, if not the cheapest pellet on the market: you can buy hundreds of high quality .177 rounds for just few bucks so .177 is a best choice for target shooting and plinking. On the other hand, a .22 pellet is heavier and has more knock-down power than .177 pellet so it is the go-to pellet of pest eliminators and small game hunters.

Cocking and loading

Cocking the gun: Put the gun “ON SAFE”, hold the rear stock firmly without contacting with the trigger, keep the gun close to your body and grasp the barrel behind the front sight. Pull downward to its limit until it stops and don’t let go of the barrel

Loading the gun: with the breech exposed when you cock the air rifle, insert the pellet into the chamber (with the pellet’s nose lying forward). Then pull the barrel up to its original position and you are ready to fire.


What I love about Umarex Octane is its open sight with stunning features. The front sight is fiber optic, which means that it uses optical fiber for the dots. It gathers and channels the ambient light in the way that it’s brighter than the dark surrounding. Fiber optic sight gives you fast target acquisition and huge advantage when shooting in low-light condition .Moreover, the rear sight is fiber optic, too. It’s fully adjustable for windage (allow you to adjust the sight left and right) and for elevation (allow you to adjust up and down). A handy-dandy iron sight, for sure!

As if the full fiber optic sight is not enough for dead-on accuracy, Umarex adds a 3-9×40 AO scope in the package. 40 is the diameter of the front lens, measured in millimeters. 3 and 9 mean that the scope has variable zoom-in power. It magnifies the image 3 to 9 times bigger than the picture you see without the scope. On top of that, this scope has parallax adjusment. AO stands for adjustable objective so you can adjust the sight according to your own unique needs

Have you seen Picatinny rail comes with the intergral dovetail in the same air gun? This rifle has that feature. Therefore, you can use whatever scope you like to mount on the Picatinny rail or remove the Picatinny rail and use the 11mm dovetail directly.

Velocity, accuracy and power

In .177 caliber, the Umarex Octane delivers velocity up to 1450 FPS with alloy pellet and 1250 FPS with lead pellet. In .22, this rifle produces 1250 FPS with alloy and 1050 FPS with lead pellets. These types of velocities put Umarex Octane into the ultra-magnum class of air rifle. Besides, since the speed of sound is 1100 FPS (may vary with altitude and temperature), you can hear the loud crack when shooting because the superfast pellet breaks the sound barriers.

Chrony test has given us the following results:  With .177 cal, Umarex Octane gives 1390 FPS with alloy, approximately 1250 FPS with lead pellet, 1168 FPS with .177 rounds, 890 FPS with 10.65 Baracuda Match, more than 1200 FPS with 10.5 gr Crosman Premier, 1154 FPS with 10.5 Crosman Premiere Domed. With .22, this Re-Axis piston gun generates 925 FPS with 11.9 gr RWS Hobby, 925 FPS with H&N Baracuda green pellet 12.5 gr, 745 FPS and 20.96 FPE with Predator Metalmag, 925 FPS and 23.75 FPE with H&N Baracuda green, 769 FPS with 18 gr JSB Exact Jumbo, 863 FPS with Benjamin Discovery HollowPoint, 863 FPS with Benjamin Discovery semi-pointed, 856 FPS with Benjamin Discovery dome, 776.52 FPE and 24.28 FPE with 18.13 gr JSB Jumbo Heavy, 993 FPS with Crosman Premiere domed pellet 14.3 gr, 899 FPS with Ruger pointed pellet, 993 FPS with Gamo Extreme, 781 FPS and 18 FPE with Diabolo RS 13.43 gr, 732 FPS with H&N Hunter 18.21 gr, 842 FPS with Crosman 14.3 gr Hollow point, 797 FPS with 13.43 JSB Monster Diabolo, 944 FPS with RWS SuperMags 9.3 gr Field line wad-cutter, 1065 FPS with RWS Meisterkulgen 8.2 gr, 1120 FPS with Gamo Raptor, 875 FPS with Gamo Match Diabolo wad-cutter, 1038 FPS with H&N Field Target Trophy Green,  800 FPS with RWS Super Dome, 683 FPS with Beeman Kodiak 21.14 gr, 875 FPS with 14.3 gr pellet, 902 FPS and 25.8 FPE with 14.3 gr Crosman Premiere Hollow Point, 838 FPS and 22.3 FPE with 14.3 gr Crosman Premiere Hollow Point, 762 FPS and 20.51 FPE with 15.9 gr JSB Exact Jumbo, 889 FPS and 20.89 FPE with 11.9 gr RWS Hobby, 682 FPS and 21.84 FPE with Beeman Kodiak domed 21.14 gr, 1029 FPS and 23.28 FPE with RWS Hyper Max 9.9 gr.

Umarex Octane

For Umarex Octane, various shooting tests have been conducted by different shooters with positive results. The common shooting group are: less than 1” in 20 yards, 0.891” at 20 yards with Predator Polymag, 0.675” at 20 yards with H&N Baracuda green, 1/2″ at 25yards with JSB Jumbo Heavy 18.13 gr, 0.2” at 65 feet with Crosman Premiere Hollow point, nickel size at 50-93 feet, 1/2″ at 20 yards with Crosman Premiere Hollow Point, same hole at 35 yards with JSB RS,same hole at 33 yards, 1” at 10-15 yards, 2” at 25 yards, penny size at 25 yards,dime size at 10-15 yards, dime size at 20 yards with JSB Monster Diabolo 13.43 gr, clover-leaf size at 20 yards with RWS Super Mag 9.3 gr Field line wad-cutter, 1” at 25 yards, 1/4″ at 25 yards, 1/4″ at 50 feet, 1/4″ at 10 yards, 2” at 40 yards,dime size at 30 yards, nickel size at 30 yards, 1” at 30 yards, penney size at 35 yards, 1/2″ at 30 yards, 1/4″ at 50 yards, silver dollar size at 50 yards,1/4” at 30 yards, 1/4″ at 45 yards, penny size at 30 yards, 1/4″ at 45 feet with JSB Jumbo Diabolo, 1” at 50 yards,1/2” at 30 yards, 3/8”-1/2” at 25 yards with Crosman Premiere Domed, 1” at 50 yards, 1/2″ at 30 yards, 1.25” at 50 yards, 0.581” at 10 meters with Beeman Kodiak, 0.368” at 10 meters with RWS Hobby, 1” at 10 meters with RWS Super dome, 0.982” at 10 meters with Predator Polymag, 0.245” at 10 meters with 14.3 gr Crosman Premiere Hollow Point, 1.067” at 25 yards, 0.292” at 10 yards with JSB Diabolo Exact 8.4 gr, 0.416” at 20 yards with JSB Diabolo Exact 8.4 gr. Further more, this Umarex Octane can shoot AAA battery at 23 meters, shoot battery LR44 at 23 yards, penetrate 1/4″ plywood and go deep into 3/4″ plywood, pierce through 3/4″ pine board, hit penny at 24 yards, blow through 1/2″ plywood, hit crow at 40-50 yards, kill squirrel at 40 yards, kill squirrel at 25 yards, go throguh 1/2″ plywood at 51 yards, go through 2×4 cardboard box at 20 yards, penetrate 4 soup cans (8 layers of corrugated metal) with the following pellets: Beeman Crow Magnum Hollow Point 18.21 gr- Beeman Kodiak Extra Heavy 21.14 gr – H&N Baracuda 21.14 gr- JSB Match Diabolo Jumbo Heavy 18.13 gr- Polymag 22.16 gr, punch through 3/4″ plywood at 40 yards with Crosman Premiere Hollow Point 14.3 gr, penetrate 3/4″ board, penetrate through 1” thick oak board at 10 yards, blow through 1×4 pine board at 75 feet with Crosman Premiere Hollow Point, hit soft ball at 150 yards, kill 2 starlings at 109 yards, kill groundhog at 40 yards, kill squirrel at 30 yards, go through 3/8” plywood and destroy wine bottle at 40 yards.


Although being a supersonic air gun in both .177 and .22 calibers, Umarex Octane produces very little noise thanks to advanced technology for noise suppressor. Therefore you can enjoy a successful hunting day or a fun plinking afternoon without startling your neighbors.

Shooting Ability

The effective shooting range of this gun is up to 100 yards. You can use it for target shooting, plinking, pest control and small game hunting.


You don’t need to buy anything else for this gun. Everything you need is already in the box.


The Umarex Octane requires very little maintenance: just clean your gun every now and then, coat the barrel with RWS Spring Cylinder Oil every few hundreds shots and you are all set.


  • Caliber: Available in both 0.177 and 0.22
  • Velocity: In .177- 1450 FPS with alloy- 1250 FPS with lead / In .22- 1250 FPS with alloy- 1050 FPS with lead
  • Loudness: 3- Medium
  • Barrel Length: 19.5”
  • Overall Length: 48.5”
  • Shot Capacity:1
  • Cocking Effort: 42 lbs.
  • Barrel: Rifled
  • Front Sights: Fiber Optic
  • Rear Sights: Fiber Optic/ fully adjustable for windage and elevation
  • Scopeable: Picatinny
  • Trigger: Two-stage adjustable
  • Buttplate: Rubber
  • Suggested for: Target shooting/Plinking/Small game hunting/ Pest control
  • Trigger pull: 3.5 lbs
  • Action: Break Barrel
  • Safety: Automatic
  • Powerplant: Gas-piston
  • Function: Single-shot
  • Body Type: Rifle
  • Weight: 9.5 lbs


Another point that I love about Umarex rifle is the 3-year warranty. While most guns with gas piston have only one-year warranty, Umarex goes the extra miles and provides up to 3 years of warranty. Additionally, some shooters are hesitant to try new technology so they worry about support if anything happens in the future. The extra 2 years of warranty take care of those concerns instantly.

  • Jaw-dropping velocity
  • Breath-taking power
  • Staggering accuracy for short and long distance
  • Brilliant sound silencer
  • Amazing fiber optic sight and scope
  • Ergonomic thumbhole stock
  • Heavy for small-build shooters
  • Import from another country


The price for Umarex Octane is just about 200 dollars. It’s a bargain if you consider innovative ReAxis gas piston, advanced silencer that makes supersonic sound no more a problem , heavy-duty power, eye-opening velocity and extreme shooting range that every shooters dreams for.

There are a couple of different listings online with different prices but the listing I found with the lowest price is the cheapest price among online e-commercial sites like Amazon, PyramydAir, Walmart,etc.

click for the lowest price

Customer review

There are a lot of customer reviews of the Umarex Octane. As can be seen from positive reviews, people love its stunning power, awesome accuracy, supersonic speed, state-of-the-art gas piston and silencer. Negative reviews show 2 main problems: The first is that the gun is too heavy for them to handle so it’s not for skinny shooters. But its solid size will help you control movement easily on the benchrest shooting. The second problem is the noise: they said it’s too loud but the gun will quiet down a lot after the break-in period.


Personally, I am the fan of the Octane but I have few words of caution for you guys: This is not a beginner gun for you. But if you love magnum power and you think you can control this beast, go for it, you will be happy that you did.


  1. So many recent comments and reviews but i can’t find any long term ownership users that can comment how this rifle is holding up. I bought the fuel and thinking of getting the octane instead. I am not too please with the trigger pull as i find it pretty hard.
    When I first shot the rifle out of the box it was like super loud then all of a sudden it completely quiet it down. Guess of the dieseling. Any comments on anyone owning this rifle for over a year with lots of use, break in period and so forth?


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