The apparatus compensates for equipment errors that prevent {TAIL ~ a marksmanship device} from providing an accurate indication of a firearm hit or {HEAD ~ miss} 
The apparatus compensates for equipment errors that prevent { TAIL ~ a marksmanship device } from providing an accurate indication of a firearm hit or { HEAD ~ miss }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD