Lets say in hex 1 i got an MG, in hex 2 i got allied riflemen, in hex 3 nothing, in hex 4 bad guys, and hex 5 i got more bad guys.
Can the MG in hex 1 have LOS and able to fire on the guys on hex 5 only?
Please see the RCD:
You will find the answer on page five:
Q: Can I shoot through my own units to hit a hex behind it?
A: Yes. Units do not block line of sight or impede firing. For ground scale, hexes are so much bigger than what the unit(s) can physically occupy.