#m47

What does "m47" mean?
m4_4aif_7aga

m47-f 744 m47-b 98 m47-2 86 m47-n 62 m47-611 87 m47-u5 37 m47-d20 47 m47-patton 68 m47-030 30 m47-1 83 m47-270 31 m47-oh 30