US2951424A - Gas operated bolt and carrier system - Google ...
US2951424A US603913A US60391356A US2951424A US 2951424 A US2951424 A US 2951424A US 603913 A US603913 A US 603913A US 60391356 A US60391356 A US 60391356A US 2951424 A US2951424 A US 2951424A Authority US United States Prior art keywords bolt carrier gas chamber receiver Prior art date 1956-08-14 Legal status (The legal status is an assumption and is not a legal …