The blank rounds can be made undersize to match {TAIL ~ the chamber dimensions} of the novel blank firing barrel to be discussed in {HEAD ~ reference} to FIGS 3A 3C, 4A 4D and 5 
The blank rounds can be made undersize to match { TAIL ~ the chamber dimensions } of the novel blank firing barrel to be discussed in { HEAD ~ reference } to FIGS 3A 3C , 4A 4D and 5
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