Design standards for paintball
Could anyone point me to a repository for design standards for paintball? Things like thread sizes are what I mostly need. I've been searching all damn day for the thread specifications for a HPR. i.e. Not the one on your HPA tank, the vertical foregrip reg. lots of searching and no luck. I've found that there are a few ASTM standards but I'm not going to pay $50 unless I know it will contain the info I want.
Can anyone help?