It's supposed to represent a house turned into a strongpoint against a known line of advance. In other works is only a bunker with a house around it. It is NOT designed to represent a turreted fort where the gun has 360 degrees of coverage.
If you hack out room in a house to place an AT gun coving the street in front of the house do you seriously think you could spin it around drag it to the back of the house to fire out the back door then drag it to the front of the house again to fire at targets there all in a three minute period??
Seriously ??
'cause that's what you're asking for
There are some houses in the MBT OOB's that OOB designers have added that don't have a main gun per se but what I described is what that Icon was designed for. If there's one somewhere with just infantry weapons then they've played fast and loose with the intent of the icon. I cannot be expected to know how every one of the nearly 35,000 units in the OOB's is put together
Don