{HEAD ~ The base} is {TAIL ~ a flat sheet} approximately 3/16 of an inch thick, shaped in plan view to match the shape of the rifle butt end to which it is attached 
is
{ HEAD ~ The base } is { TAIL ~ a flat sheet } approximately 3/16 of an inch thick , shaped in plan view to match the shape of the rifle butt end to which it is attached
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH