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