This topic has been beat to death.An Airgun is not Classified as a Firearm......period! That regulation applies to firearms, not airguns.No amount of paper work is going to help you if a cop is ignorant. It will probably just confuse them even more.There is really no reason to worry, LDC's are 100% legal on Airguns in most states, California included.
I had not heard that about DonnyFL . . . . scary stuff . . . . I thought we were past all that. I have one of his Tatsu's and it works great - much more effective than the Buck Rail one I bought to try, but the Buck Rail at less than 1/5th the cost is great for the money!
Standard does not come with a 1/2-20
just a FYI…its been my experience some 3-d moderators cant take the pressure of the PCP…..good luck