Thread: Universal M1 Carbine Slide for Late Model Carbines
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Old May 8, 2017, 10:19 PM   #4
Scorch
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Join Date: February 13, 2006
Location: Washington state
Posts: 15,248
4130 is a chrome-moly steel, very similar in composition to 4140 (the "ordnance steel"normally found in US-made firearms).
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