FIGS 1 and 2 illustrate {TAIL ~ an automatic firearm} 20 of {HEAD ~ the gas operated type} 
FIGS 1 and 2 illustrate { TAIL ~ an automatic firearm } 20 of { HEAD ~ the gas operated type }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD