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