Personally, i don't like either weapon in place of a el feed GPMG. Its a bit like the British army today were we have the LSW instead of the GPMG. But of the two, the BAR looks rather to big for such a weapon, and what with the extra rounds, i'd go for the Bren.

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'England confides that every man will do his duty' Nelson
'I'm a Norfolk man, and glory in being so' Nelson

Proud to be a GRUNT