

Umarex Octane Air Rifle Combo, Gas Piston
PY-3098-6019
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Description
While gas-pistons (also known as gas springs and gas rams) were originally touted as beneficial for airgun hunting since you can leave your gun cocked without fatiguing a metal spring, that's not the only reason you'd want a gas piston. Anyone who enjoys a smooth spring rifle should try a gun with a gas piston. Once you do, you won't ever want to go back to a gun with a metal spring!
Another point you'll want to remember about the Octane is the 3-year warranty. While most guns with gas pistons have a one-year warranty, Umarex goes the distance. Because some shooters are hesitant to try a technology new to them, they worry about support. The extra two years of warranty should take care of those concerns.
- Shop related categories: pellet guns, pellet rifles
Umarex Octane Air Rifle Combo, Gas Piston
- ReAxis gas-piston
- Breakbarrel
- Single-shot
- Rifled steel barrel with SilencAIR integral silencer
- 2-stage adj. trigger
- 3.50 lbs. trigger-pull
- Fiber-optic sights (fully adj. rear)
- Picatinny optics rail
- Automatic safety
- Ambi synthetic thumbhole stock
- 14.25" length of pull
- Rubber recoil pad
- Grooved (ribbed) grip
- 42 lbs. cocking effort
- 3-year warranty
- 9.50 lbs.
- Includes 3-9x40 AO scope (10 yds to infinity parallax adjustment, duplex reticle) and mount (scope is not mounted)
Here are the benefits of the Umarex ReAxis gas-piston:
- Smoother cocking
- Smoother shooting
- No spring torque
- No spring fatigue, even if you leave it cocked for hours
- Functions perfectly in cold weather
- Lasts longer than a metal spring


Specifications
Overall Rating
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10 of 208 Umarex Octane Air Rifle Combo, Gas Piston Reviews
Power, price, size, and everything about it. This .177 arrived yesterday, 6/20/2018. I also have the .22 version, which I bought two and a half years ago. Shooting this one, I am already acclimated, just a different caliber. I did not opt for the Stop-Shox version, even though I thought about it. I was sold on this version, if it aint broke, it doesnt need fixing. The scope is good, I know eventually the shock may cause a need to upgrade. I already have two CenterPoints. I will change when that time come. It took me 8 shots with the Crosman Ultra Magnum 10.5 grains to zero the scope on the 2 inch target at 80 feet.
Things I Would Have ChangedNothing.
What Others Should KnowThe only modification to this is the breech seal and two shims. My opinion, all reviews should be conducted on all air rifles as they were purchased, shipped, and received, as is. After mounting the scope yesterday, I did take about 15 test shots, after cleaning the barrel, from 3 different pellets: the 10.5 grain Crosman Ultra Magnum, the 9.26 grain H&N Crow Magnum HP, and the 11.57 grain Beeman/H&N Sport Silver Arrow. I chronographed 5 shots from each. The 10.5 grn.Crosman Ultra Magnum results were: 918, 938, 929, 930, 926 fps, averaging 928 fps. The 9.26 grn H&N Crow Magnum: 1040, 1046, 1028, 1048, 1024 fps, averaging 1037 fps. The 11.57 grn Beeman/H&N Silver Arrow: 880, 887, 868, 877, 878 fps, averaging 878 fps. For accuracy, 5 shots each at a 2 inch target at 80 feet, in 79 degree weather. The Ultra Magnum and the Crow Magnum both put 3 hits in the 1 inch inner circle with the other two hitting the 2 inch target. Silver Arrow 5 shots hit together, less than a quarter inch below.
Love the gun
Things I Would Have Changedtoo hard to cock
What Others Should Knowno
My Octane arrived 1 week ago. What an impressive beast. As with all new pellet rifles I sat down and watched golf while shooting about 250 rounds through it. Sat down to shoot targets and the groups were still a little loose. So I fired another 250 - 300 rounds through it and the break in is finished. Was then able to determine the best pellet . This gun likes the H&N Hunter and JSB Ultrashocks. I can shoot consistent 5 shot groups at 25 yards and cover them with a dime. Accuracy is excellent! Shoot around 800 rounds the first week. Now for the 1400 fps they advertised. So I got out the chronograph the results were impressive. Gamo Platinum pellets 1340 fps, screamers but useless to hunt with. H&N Terminator at 1050 fps. The H&N Hunter at 720 fps and the JSB Ultrashocks at 745 fps, real killing power for a .177. It will even shoot the Sniper mag 15 gr pellet at 580 fps. I put a UTG Red/Green dot sight with a 3x magnifier behind it. Weighs 10.2 lbs.
Things I Would Have ChangedMaybe make it a little longer and a little heavier...just kidding
What Others Should KnowThis is a Big Boy Air Rifle, not for kids. Alloy pellets sound like a 22 rifle. Heavier pellets are true power killers. Take your time break it and you will be continually impressed with what this rifle will do.
3 years warranty
Things I Would Have Changedmake it more quiet
What Others Should KnowThis monster at 80 yards is powerful
with a 6x24x50 scope bench rest set up the scope to 18 zooming one mil to the right.
is very strong and loader, at 100 yards one mil 1/2 to the right perfect
the rifle by default is 1200 fps with 13.5 pellets speed up to 1400 fps
Gas piston, powerful, inexpensive and not bad looking.
Things I Would Have ChangedNeeds to go on a diet, too heavy.
What Others Should KnowI've fired about 200 shots and it's still seems to be burning off excess oil. The first few shots were very loud, almost scary.
I have the Umarex Octane .22 caliber air rifle. I like the power to value, well worth it.
Things I Would Have ChangedThe scope is pretty good, except no mildotsn, not absolutely necessary. I did have to change, only because the reticle was loosened by the recoil shock after about two hundred rounds. Replaced it with a CenterPoint 3-9X32AO mildot scope.
What Others Should KnowI did purchase the Archer Air Rifle XMV breech seal and shim kit. The breech seals and shims fit Umarex and Ruger Air Rifles, both .177 and .22 caliber. Also, all airgunners should have a chronograph for pellet velocity evaluations and to determine if your air rifles/guns are losing velocity due to breech seals or piston problems. Woodys World.
the power seems fine. Though I will need to fire through Chronogragh to check. It has gotten easier to cock an I have yet to fire a 75 rounds through it. It came zeroed and scope mounted.
Things I Would Have ChangedSo far, nothing yet. I will be testing the power.
What Others Should KnowThe gun appeared fairly easy to cock. Much easier than my Hatsan 100x vortex under-lever. I received pellet expansion of 2mm, from a distance of 16.25 feet. The pellet travelled through a half inch thick styrofoam, 3/4 inch framing ply, 1/2 inch particle board and got stuck in the dart board behind. All were lined up with virtually no space between. A few pellets almost made it through the dart board, in the same scenario. They deformed the other side of the dart board. Stay tuned.
What's not to like? Powerful, accurate, comfortable. I find this gun to be absolutely perfect.
Things I Would Have ChangedAdd sling mounts. Definitely not a deal breaker though.
What Others Should KnowIf you're looking for a solid dependable.22 that comes with a good scope, look no more.
This is the first air rifle I have owned since the '70's era Crossman and Benjamin pump up's. Wow! You've come a long way baby! Everyone who sees this behemoth asks if I'm deer hunting, and what caliber? I am getting to know the rifle, I have owned .22's and shotguns in the past so shooting is not totally knew to me. I have only about 100 rounds through it, and I also had the "20 for 20" service done. I figured this would prevent me from receiving a defective rifle.It seems to have done just that. I have had zero problems with the gun, other than loose screws on the scope mount, all of them! I assume this is the cause of the rifle being quite a bit off, 6 inches, target. After sighting the rifle in using H&N Baracuda Match .22 Cal, 21.14 Grains, Round Nose, a heavy pellet, it is very accurate indeed. If using a bench rest I can get dime size groups at 25 yards. I also shot some 18 grain Baracuda hollow points with very little if any change in accuracy or hit points.
Things I Would Have ChangedTrigger is sloppy. I really must learn how to work this out of the rifle. There are tutorials available. The trigger is my only real gripe, I feel with a better trigger my shooting would improve noticeably. After paying for the 20 for 20 service I would expect the screws and mounts to be tight. They were very loose on the scope mounts.
What Others Should KnowIf you are considering a first airgun purchase, this is a good one. Note: one must be in fairly good shape, and have full use of both arms and hands to cock this rifle. I figured out the best way for myself, which does not deviate from the manual much at all.
I am very pleased with this rifle, and my main reason for purchasing it is to eliminate highly destructive groundhogs, which are getting out of hand here in West Michigan, at least on my 30 acres of alfalfa, holes all over.
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Jun 22, 2018
By John
Everything.
What Others Should KnowThe below review, that was submitted before this addendum, is from Woodys World. I do recommend this air rifle in either caliber. Get a chronograph. Woodys World.