I came across what appears to be the Japanese version of the BX. It is larger and seems to be about half-way between the North American BX and B in size. They have some interesting attachments too, including a very different FEL.
I thought some of you guys might like to see some photos of the "JBX", which also seems to go by the name "Bullstar":
Bullstar Images
JBX Specs PDF
I thought some of you guys might like to see some photos of the "JBX", which also seems to go by the name "Bullstar":
Bullstar Images
JBX Specs PDF