Systems and methods applying {HEAD ~ density altitude} to {TAIL ~ ballistic trajectory compensation} for small arms are provided 
to
Systems and methods applying { HEAD ~ density altitude } to { TAIL ~ ballistic trajectory compensation } for small arms are provided
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH