Quick view Add to Cart 44B25259 - M2 or M3 Electric Gun Heater - Type J-4 / ANJ-4 - MIL-H-6769 - New Surplus This M-2 Electric Gun Heater - Type J-4 in NS condition and ready to be part of various aircraft restoration projects!Part Number: 44B25259Part Type: 44B25259 - M2 or M3 Electric... Was: $150.00