For rifles which were issued, almost all ended up overhauled and updated at some time. Most certainly are a mish-mash of elements and were upgraded as necessary. Here are several of These areas. Manufactured only as an "overstamped" model (an arsenal-refurbished M1 with new rear sight along with other late https://troyehchc.mycoolwiki.com/7851381/psa_pg_9_ar_9_an_overview