A Vickers salesman selling oversized phasers

What would a descendant of the Vickers salesman sell in Star Trek?

Oversized phasers, either an ambitious shipboard adaptation of a planetary weapon or existing mega-phasers.

A fictional descendant of the Vickers salesman would try to sell planetary phasers for use aboard ships. The initial example is the PH7, described as too large for normal shipboard mounting. A competing suggestion is the mega-phaser, which another participant says has already been fitted to ships. The joke depends on the familiar procurement tension between an attractive weapon and the platform needed to carry it.