{HEAD ~ Additionally, the means} for cooperating with {TAIL ~ the retention} catch further including means for securing the adapter in place within the secondary receiver chamber when the magazine catch of a rifle is moved out of the through opening of the adapter 
for cooperating with
{ HEAD ~ Additionally , the means } for cooperating with { TAIL ~ the retention } catch further including means for securing the adapter in place within the secondary receiver chamber when the magazine catch of a rifle is moved out of the through opening of the adapter
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL 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 OTH OTH OTH OTH OTH OTH OTH