Board Thread:Off Topic/@comment-26397825-20170714130723/@comment-27144409-20170825124936

That's just an LMG (Light Machine Gun) with a detachable bayonet. It's not two forms. Also, a bayonet would be impractical on an LMG. You'd be better off with an unnamed combat knife for emergency CQC (Close Quarter Combat) that is entirely seperate.