A hand grip 38 is mounted on {HEAD ~ the barrel} for isolating {TAIL ~ the user} from direct contact with the barrel 
for isolating
A hand grip 38 is mounted on { HEAD ~ the barrel } for isolating { TAIL ~ the user } from direct contact with the barrel
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH