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					Originally Posted by  rob love
					 
				 
				If you have the PDF on dischargers that I sent to a lot of the guys, it lists that discharger as a 2" bomb thrower. Manual is dated 1942, so I suspect both dischargers were concurrent.  
One advantage to that discharger is that it could be used with 2" mortar bombs I believe. 
			
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 I agree, other than to say the rifle/4" tube combo predates the 2" launcher. Also that the Otter (and Fox) hulls are pre drilled with the centre and 1/4" aligning holes for the 4" one so the 2" would need some kind of adapter, as we are seeing in Ed's pic.