I had someone ask me to be a reference for a FAL that I was a bit weary about. I did not think I knew them well enough to vouch for them. I suggested that this was the case and if asked by the officer my answers would have reflected this, so I sat down with them and helped them wih their understanding of all thingd firearm that they wanted / needed to know and discussed who they really should be asking to be their referee....(They did have other options that in my mind knew them better and were more appropriate)