u/Mandrysi

I think we can all agree it is either S4 or S5 gun on the side of the M80. They are 6.6m and 8.8m respectively. Looking at the grid on the sneak peak, we can tell the gun is about 2.8squares long.

If it is S4 gun, one small square is 2.35m, and if S5, it would be 3.14m. Based on the fact that the ship is 14.5x8 squares in size. that would make the top view dimensions either

35x19m
or

45x25m

Now, 325a is 27x17 ship, and avenger titan is 20x15 so here are 2 options to compare the M80 to 325a and 2 to compare it to avenger

While it definitely looks rather slick in height, it actually seems to be quite a big ship, definitely larger than it would initially seem so