The twin-mount phasers on the rollbar are sometimes classed as pulsephasers.
The Miranda-Class is obviously more durable and adaptable than the others, seeing as how it outlasted the others and has been shown in many different roles (combat, science, supply) with different styles (rollbar, sensor arrays).
Commander Austin Harris, First Officer, Deep Space Nine (by FltCpt. Bossco)
8.01 - Darkest Before Dawn
(Chapter 8 added, 12/09/2015)