It matters if you make any changes. Simply adding a vertical grip can change a pistol to a AOW which is regulated under NFA. There are a lot of simple seemingly inconsequential changes that can take a firearm from legal to illegal in the eyes of the ATF.John K
***STOP WRITING LETTERS TO THE ATF ASKING QUESTIONS!***when you write a letter it opens the door for them to restrict our Rights without any Due Process or ability to block it.