How permenant are these? If i decide to build a dummy gun can i easily remove the Dummy Reciever and build it on a 100% later on? Preserve the kit for later use and still have a kick ass display piece, or is there some compliance BS you have to follow to make a dummy gun that would render it unuasable for ever. Any information you could share  would be greatly apreciated. Thanks - Zap

Yes you could.  The dummy receiver has a fake bolt and and you only use a the trigger-No hammer or disconnector and since the receiver is plastic the weight will be way off balance when compared to a real gun.  But I will warn you once you build the dummy gun you WILL Get a real receiver to build a functioning gun. Be careful you don't misplace any of the pieces.  You will not alter any pieces that would be used to make a functioning gun.