Just bring the o-ring to your local hardware store, and find an o-ring that matches it. That's what I did!

 

Good ideea mate! Thanks

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You want a #13 o-ring


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You want a #13 o-ring

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Is that in BS ?

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This one: https://www.amazon.com/Danco-96730-Rubber-Faucet-10-Pack/dp/B000L8BB6I

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Thanks bro!

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Just a heads up, the AA blue pistons are notorious for having a bad airseal. In my experience the AA piston may need a even larger o-ring (#14) to get a 100% airseal, but at that point the oversized o-ring will have a lot of friction inside your cylinder which will decrease your FPS.

I used the AA piston for about 2 years and it was the bane of my build. I recently picked up Springers new piston and I am completely in love! I’m using the AA Teflon cylinder btw


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Just a heads up, the AA blue pistons are notorious for having a bad airseal. In my experience the AA piston may need a even larger o-ring (#14) to get a 100% airseal, but at that point the oversized o-ring will have a lot of friction inside your cylinder which will decrease your FPS.

I used the AA piston for about 2 years and it was the bane of my build. I recently picked up Springers new piston and I am completely in love! I'm using the AA Teflon cylinder btw

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I will have a look at that, just bought myself a teflon cylinder, so once i get a new o ring will decide if piston will need changing.

Thanks for the heads up.

LE: btw does the springer piston work with the AA spring guide ?

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Yep Springers piston will work with AA spring guide


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One thing I found when working on AA pistons is that the front guide ring sometimes sits too far in, it goes a bit into the channel of the o ring. That is an issue that destroys the airseal on AA blue piston, it pushes the o ring, you need to grind down the delrin ring a bit so that it does not interfere in the channel.

 

Good call, you will love it.


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