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safety lug clearance
I bought a low bent bolt for my A3,sporter, The original bolt safety lug fits tightly to the receiver, the ''new bolt'' safety lug sits approx 1/32 away from the receiver when the bolt is closed, I have not had it go/ no go checked yet ,it just does not look right to me , should I even bother having it checked out are there specs out there that would tell me what the clearance on the lug should be? Thanks in advance , Aris.
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11-05-2013 08:37 PM
# ADS
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There's a minimum measurement that's supposed to me taken with a feeler gage. It's pretty thin and is in the thousands of an inch I believe. I can't remember which of my books it's mentioned in.
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The original bolt should not bear tightly on the receiver. The bolt is designed to "give" slightly and a small gap is necessary to allow some "give". Your new bolt sounds correct to me.
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The clearance specification most often cited is a minimal clearance of .004". The safety lug should NEVER touch or bear upon the receiver bridge under normal operating conditions. A 1/32" clearance between the back of the lug and the bridge should be fine.
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