there is a few ways to get it to work. if your trying to keep the air control then you will need some adapters to raise the pin to the top of the cap. the 901 to 510 rethreader with a 510 to 510 is a common way to go about this. http://ggwiki.et.com.mx/index.php/GG_adapters that shows all the options with pics for ya bud
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