If you are talking about a compact .410 shotgun that is currently marketed and is actually called "Snake Charmer," then you are describing a stainless steel gun with a plastic stock and short, but legal 18" barrel and which is also greater than 26" overall length.
If you are describing something that is a shotgun with a barrel LESS than 18" and a pistol grip only, such as an H&R Handy Gun, then your friend is in possession of a highly illegal NFA weapon, unless it was originally duly registered prior to the passage of the GCAs of 1934 and 1935. (They were legal to own prior to that.) If not, it is a Federal felony and your friend, in a worst case scenario, can do hard time and get a big fine.
If, by chance, the gun was properly registered (if it is what I think it is), then your friend can legally inherit the gun without having to pay the AOW tax of $5.00, but still has to submit paperwork to BATF.
Bottom line: If it has a barrel less than 18" and is smoothbore, don't be talking about it on a public forum, and for God sakes, don't publish any pictures of it.