[MIB 1473]

I found myself thinking about the Autocannon problem again last night, and may have stumbled upon a partial answer. An autocannon is little more than a scaled-up machine gun, and should have stats that reflect that. But right now, the AC looks like more like a rapid-fire HMG ("HVMG"), albeit with fewer shots. So the answer may be a more comprehensive adjustment of that weapons family.

For example:
LMG: 1d-1, to-hit 7, 20 shots, $?, 150lbs, 1 space
LVMG (proposed): 1d+1, to-hit 6, 20 shots, $X, 325lbs, 1 space
MG: 1d, to-hit 7, 20 shots, $1500, 200lbs, 1 space
VMG: 2d, to-hit 6, 20 shots, $2700, 450lbs, 2 spaces
HMG: 2d-2, to-hit 7, 20 shots, $?, 350lbs, 1 space
HVMG (proposed): 3d, to-hit 6, $X, 750lbs, 3 spaces
AC (proposed): 3d, to-hit 7, $X, 600lbs, 2 spaces
GC (proposed): 6d, to-hit 6, $X, 1100 lbs, 4 spaces
HAC (proposed): 4d, to-hit 7, $X, 800lbs, 3 spaces
HGC (proposed): 8d, to-hit 6, $X, 1400lbs, 5 spaces