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Posted: 5/14/2010 5:04:21 PM EDT
My build is nearing it's completion. All it need is the gas block/FSB put in the proper spot and tightened. I read that the gas block should be 1/32" from the shoulder of the barrel when not using the end cap that holds the hand guards in place. If my math is correct, 1/32' is 0.03125 inches. This might be a stupid question but how accurate does that distance have to be? I don't own calipers but I do have a feeler gauge set. With my feeler gauge I can get a gap of 0.031. Is that close enough for rock and roll or should I invest in some calipers? Or is than another way. Thanks in advance for any help. Here's a picture.
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