Primer for Igniting Propellants in Recoilless Rifles Ammunition

Fig 52 PRIMER FOR IGNITING PROPELLANTS IN RECOILLESS RIFLES AMMUNITION 

Fig 52 shows a primer-igniter for recoilless rifle ammunition 

The above described primers are of percussion type, but there are also electric, combination electric percussion, friction and ignition primers 

Electric Primer. This type is fired by the heat generated when an electric current passes thru a resistance wire or conductive primer mixture embedded in a primer compn. It was formerly used in harbor defense and railroad artillery ammunition (Ref 15, p 117), but is 

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