This is the new HaT Gardner Gun in 1/72nd scale plastic.
Three of the guys have rifles one is an officer with sabre and pistol and the other two have open hands presumably to operate the Gardner Gun.
It makes up as a neat little gun. The vertical magazine is not emplaced in this photo. You get one gun for each carriage or naval mount, so you will have left over carriages or naval mounts. Not a problem as both of these are very useful items. I don't know much of anything about the British Navy in the colonial period, but these guys fit my stereotype. I will probably cut their heads off and use the flat hats on them. That looks more US Navy to me and I need some US Navy for the turn of the century.