The particular material used, 7075 aluminum, is a readily available alloy of {HEAD ~ aluminum}, {TAIL ~ zinc}, magnesium, copper and chromium 
The particular material used , 7075 aluminum , is a readily available alloy of { HEAD ~ aluminum } , { TAIL ~ zinc } , magnesium , copper and chromium
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH