Quote:
	
	
		
			
				
					Originally Posted by  Imp
					 
				 
				I would give it an open rear so armour 0 with fire control & range finder 2 
			
		 | 
	
	
 The various M40's from the USMC OOB also have FC and RF 2 based on the spotting rifle that's part of the M40 (and M40A1).
The M40 and M40A1 are pretty much interchangeable BUT there was a significant improvement in the HEAT ammo around 1962 that increased the HEAT Pen from 45 to 62.