We know that many of the slave laborers skipped some of the important steps in the manufacturing and assembly of the G-43 rifle. The lack of heat treating is one of the most common forms of sabotage encountered by the collectors of these historical rifles today. Many thousands of rifles were made every month. Quality control was certainly difficult to maintain, and was most likely not a high priority under the enormous production quotas and difficulties. When shooting these rifles today, part failures can be dangerous and ruin the value of a very expensive collectible rifle.
A bolt carrier that was either missed in heat treat or simply under heat treated. Cracked after 21 rounds.
Indications of softness are lots of hammer marks in front where the op rod strikes the bolt carrier.
After realignment and TIG welding.
A properly heat treated part
should show only rub marks.
Finish profile and shaping and bluing. Restored
for looks only, unfortunately without a proper
heat treat, the part may fail again.

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