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Old February 16, 2018, 03:15 AM   #21
tangolima
Senior Member
 
Join Date: September 28, 2013
Posts: 3,765
Ok, I think I know what you have. The problem never happens for the first round of a fresh clip, correct? One round fired. You let go the trigger. The trigger is stuck in the pulled position, never resets. You pull the trigger again. There is no trigger movement as it is already in the far most backward position. When you let go the trigger again, the hammer drops. Sounds right?

The secondary sear engagement is not negative enough to reset the trigger consistently. The primary sear engagement may be marginal too. A smith who is familiar to M1 fire control should be able to correct that. A new trigger group will correct that too, if it doesn't have problems of its own.

It may be due to wear. But it is more likely someone was trying his hands on do a trigger job perhaps.

-TL

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