How can I lower the FPS of a NBB CO2 Pistol?

[benepv]

I just bought a NBB KWC Makarov which shoots extremely hot at 480FPS. I need to lower this to my site limit which is 350FPS. I don't want to have to use .3's instead of .2's as I don't want to face the risk of being kicked off site. I have heard people say that I can cut a couple of coils off the hammer spring and others are saying that I can drill holes into the barrel which will release some of the gas but I don't really know what I'm doing. Any ideas?

[leroyinmotion]

Re: How can I lower the FPS of a NBB CO2 Pistol?

you can get rechargableco2 bulbs that you can use green gas to charge up ths will drop fps they look the same as co2 bulbs bt have a side fll valve seems the easiest way wthout moddng your gun hope ths helps

[benepv]

Re: How can I lower the FPS of a NBB CO2 Pistol?

Would I be able to refill the bulbs using a green gas canister or would I need to purchase a cylinder and refill the bulbs from a valve?

[Baz]

Re: How can I lower the FPS of a NBB CO2 Pistol?

You just fill the green gas bulbs as you would fill a green gas magazine from a standard can of gas.

[leroyinmotion]

Re: How can I lower the FPS of a NBB CO2 Pistol?

thats it Baz easiest hassle free way without buggering up the gun in any way at all

[benepv]

Re: How can I lower the FPS of a NBB CO2 Pistol?

Aren't the bulbs meant to be purely for CO2 though? Also, is there any chance you can link me to one in a PM? Appreciate the help guys.

[leroyinmotion]

Re: How can I lower the FPS of a NBB CO2 Pistol?

i guess you could fill them wth a co2 bulb in a variable fill adaptor and set the pressure lower wth it but t doesnt require co2 green gas or propane whatever you want really

[benepv]

Re: How can I lower the FPS of a NBB CO2 Pistol?

Sorry, just one last question... How much do you think using a green gas bulb instead of CO2 will bring down my FPS?