An alternative to what used to be ok, a mount against the back window of a truck which years ago no body would even think of taking. No longer the case, and under the seat isn't a place while seated anyone could reach and it's our of sight and not a place that would be checked unless someone actually knew it was there. In a car You could use the trunk but in a truck would not have that location available. No t anything I'd seen before but anytime You had to have those firearms with you seems a good place for them.