US PATENT SUBCLASS 89 / 138
.~.~.~ Locks bolt open

Current as of: June, 1999
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89 /   HD   ORDNANCE

125  DF  AUTOMATIC {14}
132  DF  .~ Firing device operation or control (e.g., full automatic) {12}
137  DF  .~.~ Interlocks between firing and cartridge feeding {1}
138.~.~.~ Locks bolt open

DEFINITION

Classification: 89/138

(under subclass 137) Guns wherein the breech block is locked open after the last cartridge is fed from the magazine.