And I'll echo pax' comments.
It was my pleasure some years ago to take LFI-1 (as MAG-40 used to be called) from Mas and Jon. It was also my privilege a few years ago to work with Mas and Jon as an assistant instructor for a MAG-40 in Sierra Vista, Arizona.
"It is long been a principle of ours that one is no more armed because he has possession of a firearm than he is a musician because he owns a piano. There is no point in having a gun if you are not capable of using it skillfully." -- Jeff Cooper