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 a rifle is moved out of {TAIL ~ the through opening} of the adapter 
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 a rifle is moved out of { TAIL ~ 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 OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH