Date: 27/5/2024 12:36


Air Venturi Mainspring, Fits Beeman R9, R10 & R11 and Marksman Air Rifles

Main Product Rating 5.05.0 (4 reviews)
Air Venturi Mainspring, Fits Beeman R9, R10 & R11 and Marksman Air Rifles

Air Venturi Mainspring,, Image 1Air Venturi Mainspring,, Image 2

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  • Air Venturi mainspring
  • Fits Beeman R9, R10 and R11 air rifles
  • Also fits Marksman 55,59,70,71,72 , 56,57 and 58
  • For professional installation only.

Item Code: BNP-9048 [PY-A-3658]


Weight2.0 lbs

Average Customer Review

Rating 5.05.0 (4 reviews)
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Rating 5.05.0 5.0

Rating 5.05.0 5.0

Things I liked:

Works great. Spring settled in quickly. I got stable chrony numbers after the install and breaking in the spring a bit. I would buy again for sure.

What others should know:

I think installing springs is NOT a do-it-yourself project. I recommend seeking a pro to do it.

Rating 5.05.0 5.0

Rating 5.05.0 5.0

Things I liked:

I have rebuilt 4 times now with this spring and find it to work and last longer than the original spring that came in the HW97K.

Things I would have changed:

I wish that the springs came already polished

What others should know:

Be sure to polish both ends of the spring before installing it

Rating 5.05.0 5.0

Rating 5.05.0 5.0

Things I liked:

Slightly snugger fit. A bit more power than original spring

Things I would have changed:


What others should know:

works great

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  • Destinie from USA asked:

    What spring do I get for HW 77k carbon for 25 Cal or are they the same how many coils

    • Chevota from USA answered:

      They use the same spring since the rest of the gun is what determines what spring it needs, not caliber. Of course you can always find a stronger one if you want more power, like a Vortek, but typically a stronger spring has drawbacks due to the harsher reverse recoil. Like it's harder on the scope and it jars the gun more so accuracy suffers. You can certainly try one, or this one, and see how you like it. As for coil count, the picture may be generic. Plus coil count is not very important, what matters is the spring rate, length & force at coil bind, and quality. So one with less coils could be better than oem, or the other way around. More coils gives you better spring rate (lower rate), but due to space restrictions in the gun that typically means smaller wire so it's weaker compressed. Fatter wire is stronger compressed, but with a higher spring rate so it's like two steps fwd one step back. Then there's outside/inside diameters which affect power as well, and can make it louder due to fit. The oem spring is close to ideal in all specs for the avg shooter, but depending on what is important to you there is likely room to alter it. Most just want more power but many find a stronger spring is not worth the trade off and they take it out. Whatever you do buy top quality because lesser ones weaken more with use than good ones. Vortek should have a variety of springs that fit, plus they include specs to make a better decision.

  • shahriar from Bangladesh asked:

    could i fit this spring to my hw97kt? how much energy coul it produce?

    • Dan from USA asked:

      Only 26 coils?

      • Chevota from USA answered:

        I dunno but i wouldn't trust the pix which is no doubt generic. I wish they'd post all the specs, including rate. The following may not help you but my oem HW95 spring (circa 2015) is .810" OD, .122" wire, 34 coils and 11.2" long relaxed w/ maybe 20 shots on it. Vortek has some springs and they do give specs on their site. Top quality too.

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