The drive apparatus can be modified, with {HEAD ~ the addition} of a gear and {TAIL ~ chain}, to reset or activate steel or other reactive targets 
of
The drive apparatus can be modified , with { HEAD ~ the addition } of a gear and { TAIL ~ chain } , to reset or activate steel or other reactive targets
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH