== "Citation Needed" for the Legality Section == 

 I would like clarification on what sort of citation one could possibly give for the lack of legal prohibition on a certain class of firearm. Basically, there's no way to cite the non-existence of a law.  

 If this is a request for citation of the prohibition of .50BMG in those jurisdictions, it ought to be moved to the middle of the paragraph, where the uncited assertion is.