CO2 Blowback reduction

[Sewdhull]

In my co2 mags for a we big bird there is a fine mesh which serves to reduce pressure. You may be able to fill the mesh to reduce the area that lets gas through.

However it's the rocket or flute valve in the bbu that determines how much gas goes down the barrel.

Reducing the spring tension or putting a spacer in to reduce its travel will serve to close the valve quicker.

It seems the knocker, which presses the valve on the mag stays in place until the slide reciprocates and it's the flute valve that when it's pushed shut allows the pressure to operate the slide.

https://youtu.be/IeQWC3-5YTo?si=0Dv3r9OlPbaiLQUG

 

[gavinkempsell]

I had the understanding that a new bulb could run a pew hot  for the first few shots, then it settles down a bit.

I'll run a few mags & canisters through it next week to see if it makes a difference.

It sounds like yours is a "gen 1" model

Yeah, it's non blow back too so all the gas is pushing the bb.

 

[theSwede]

If its a nbb it might be hard to get the power down enough.

Have you thought about simply getting regular gg mags for it?

Although it might even run hot on regular gg as its a nbb. But then at least you can try weaker gas…

 

[gavinkempsell]

It's purely for display, I added some canisters to an online order when I saw how cheap they were. Was just surprised how spicy it was.

 

[gavinkempsell]

Being my day off I've popped a couple of canisters & several bb's through it and I can rest easy, it's a respectable 1.66j but a little hot on 2.5's at 377.6fps for my local site.

 

[pyromancer6]

I had the understanding that a new bulb could run a pew hot  for the first few shots, then it settles down a bit.

Me and a friend went halves on a second-hand Co2 converted Galaxy M82 barrett a while ago and didn't have a chrono at the time as we were pretty new to the sport - imagine our suprise when it decided to shoot 3.6J on the first shot when we borrowed a chrono to test it at our site's range lmao - it calmed down after around 15 or so shots to normal "bolt-action" power which made it quite a pain in the ass to field which is why it sits in a bag in a cupboard somewhere ? - it was still such a good deal that we're not upset about it lol