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Umarex Octane Air Rifle Kit, Gas Piston

4.05 reviews
Umarex Octane Air.

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See also

  • The Umarex SilencAir.
    The Umarex SilencAir system is a noise suppressor, more commonly known as a silencer, that is permanently attached to some air rifles offered by Umarex US.
  • The ReAxis Gas-Piston.
    The ReAxis Gas-Piston System by Umarex gives you increased velocity, and more powerful impact.
  • Umarex Octane air rifle kit
  • 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 unmounted 3-9x40 AO scope (10 yds to infinity parallax adjustment, duplex reticle), mount and barrel-clamp bipod

Here are the benefits of the Umarex ReAxis gas-piston over a coiled metal mainspring:
  • 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

Gas pistons were originally advertised as beneficial for airgun hunting because you could leave your air rifle cocked without fatiguing a metal spring. But that's not the only reason you'd want a gas piston. Smooth shooting is a very noticeable difference over a metal mainspring -- no twang! In fact, for some shooters, the twang of the metal spring is the biggest drawback. Your ReAxis powerplant is twang-free!

This version of the Octane includes a removable barrel-clamp bipod. That's much more convenient than a bipod that uses a specific mount. You can attach and remove it anytime you like, or move it further up or back on the barrel. Whatever your specific shooting situation demands, this bipod is able to meet it.
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See manual

other products by Umarex

Caliber0.177" (4.5mm)
Max Velocity1450 fps
Barrel Length19.5"
Overall Length48.5"
Shot Capacity1
Cocking Effort42 lbs.
Front SightFiber Optic
Rear SightAdjustable for windage & elevation
Suggested forSmall game hunting/plinking
Trigger Pull3.5 lbs
ActionBreak barrel
Body TypeRifle
Weight9.5 lbs
See manual

other products by Umarex

Average Customer Review

4.0 (5 reviews)
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4.0 4.0

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5.0 5.0

By Eli from USA on 2017-04-17
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5.03 ratings

Things I liked: Hits HARD, and very accurate. The included scope was OK, but when I installed a UTG scope as recommended by PA staff it turned into a great combo. I use it primarily for critter control and it works great. The integrated grip in the stock is very comfortable, and the gun has a unique look.

Things I would have changed: As others have mentioned, this is not for kids or people with sore arms. It's heavy to carry, and tough to cock. I also wish they had included some method to mount a sling. It's good it has their silencer technology, because it's very loud :) Lastly, I didn't find the bipod useful at all.

What others should know: I don't think you can go wrong for the money. The weight, tough cocking and noise it puts out is pretty typical for a magnum rifle, and it's a pussycat compared to my .25 Hatsan 125 Sniper. Save a few extra pennies and put a nicer scope on it.


5.0 5.0

5.0 5.0

5.0 5.0

By Gary from USA on 2017-01-29
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5.03 ratings

Things I liked: Very well made. Heavy and long but that is what I like in a gun. It seems to help me hold it more steady to aim. Excellent craftsmanship. Not a toy or a cheap feeling gun. The scope is very good for one that comes included. After the initial cleaning and break in it is very quite considering the power of the gun.

Things I would have changed: Hard to cock. Maybe it has to be to get that amount of power but I have a bad right shoulder and I have to use my left arm to cock it. But I get it done. Not a gun to plink a couple hundred or more shots in a morning with. I would like to see it come with some sort of a sling. If you carry it in the woods for a few hours like I did last weekend it does tend to get rather heavy. I would like to see them reverse the safety. It is easy to release accidentally. Would make more sense and be a little safer to push the safety forward instead of pulling it back.

What others should know: Make sure to clean the gun before you shoot it. If you don't the sound will scare the hell out of you. Lol. Also be sure to get a good hold on the fore grip when using the bipod. Don't rely of the bipod to hold it steady. The recoil will have your shots all over the board if you just let it rest on the bipod. This is my first magnum air gun and I was very impressed and satisfied with it. It shot great right out of the box. Had to do very little fine tuning on the scope but once you learn how to hold the gun it did a great job. The delivery time from Pyramid Air was very impressive, but if you have a question you would be better off calling since it took a full week to get an answer from them about a question I had using the e-mail. I'm just glad it wasn't anything important. Overall I am very happy with the gun and service from Pyramid.


5.0 5.0

5.0 5.0

5.0 5.0

By Gerald from USA on 2016-11-24
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4.663 ratings

Things I liked: Just received a .22 cal. Put a 6-24x50 scope on it zeroed in 11 shots at 50 yards it shoots a dime at 50 cocks smooth looks good in 61 and it's easy enough a bit more then my prowler as for power wow. 1.5 inch plywood at 50 yards then into the woods great gun great price

Things I would have changed: It's a bit heavy and I think the front of the stock could be rounder

What others should know: Buy one it's a great gun I will update this review after 200 shots good hunting


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  • Johnny from USA asked:

    trigger job

    • jason from USA asked:

      Do y'all have payment plan or Laraway

      Item Description

      UX-2251302 [PY-3732-7173]
      1450 fps w/alloy pellets, 1250 fps w/lead pellets
      Caliber0.177" (4.5mm)
      Max Velocity1450 fps