The British used the M5 and M5A1 versions of the half track.
Unfortunately I thought I had the M5, but I wrongly purchased the M3 plastic kit rather that the M5 from Warlord games.
Thanks to a couple of guys on the Chain of Command Face book site who pointed this out to me, so I am currently making some superficial mods by trimming back the front mud guards to help it pass for a M5 see last photo.
This link is a very helpful site:
look under United Kingdom and USA halftracks
I chose to model the vehicle without the Machine Gun ring as per: http://armorama.com/modules.php?op=modload&name=SquawkBox&file=index&req=viewtopic&topic_id=230948
The only items I added to the model are the back packs hanging off the sides, I also continued with the wet mud look as opposed to dry.
|The 50 cal and 30 cal machine guns are mounted on thin cut down nails with magnets glued on the bottom and sealed with Green Stuff.|
|Circle indicate where magnets have been embedded in the seat and the floor of the half track and sealed with Green Stuff.|
|Half track with 30 cal MG|
|Half track with 50 cal MG|
|Trimmed away the the mud guards to help make it look more like a M5.|