Workpiece for producing a firearm

Abstract

Workpieces for producing a firearm have an elongated body defined within a cross-sectional profile with a first elongated passage configured to receive the upper portion of the bolt, and with a second elongated passage configured to receive the lower portion of the bolt, and the elongated body having a separator between the first elongated passage and the second elongated passage and configured to prevent installation of the bolt assembly when the separator is present, and to enable installation of the bolt assembly when the separator is absent. The cross-sectional profile may be along the entire length of the elongated body. The cross-sectional profile may fully encompass the first elongated passage. The first elongated passage may be open only at the ends of the elongated body. The cross-sectional profile may have a U-shaped cross-section.

I claim: 
     
         1 . A workpiece for producing a firearm configured to receive a bolt assembly having a lower bolt portion including a bolt, and an upper portion joined to the lower bolt portion at a junction portion, the workpiece comprising:
 an elongated body defined within a cross-sectional profile with a first elongated passage configured to receive the upper portion of the bolt assembly, and with a second elongated passage configured to receive the lower portion of the bolt assembly; and   the elongated body having a separator between the first elongated passage and the second elongated passage and configured to prevent installation of the bolt assembly when the separator is present, and to enable installation of the bolt assembly when the separator is absent.