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9/22/2017 12:11:25 AM
Posted: 12/18/2005 12:16:49 AM EDT
I've just run into a bad gas key on a RRA carrier. The whole assembly is brand new but the key seems to be angled up a bit at the front and the hole is a VERY tight fit for the gas tube. I've tried two other RRA bolt carriers in the upper and they fit fine. Is this common? Is fitting a new key the solution or am I missing something here?

Link Posted: 12/18/2005 4:17:16 AM EDT
Link Posted: 12/18/2005 5:46:59 AM EDT
Link Posted: 12/18/2005 8:23:01 AM EDT

is the tight fit due to the angle or the ID?

Seems to be mostly the ID but the angle makes it worse. If I hold just the carrier and gas tube in my hands the tube is still difficult to insert and remove. The angle is difficult to see, noticed it by measuring with a caliper. From the bottom of the bolt to the top of the leading edge edge of the key the problem bolt measures 1.292" and the good bolt measures 1.269", that is a difference of 23thou which given the tight ID does not help the problem. I can also see where the key is marking the underside of the gas tube.
Link Posted: 12/18/2005 3:35:00 PM EDT
I think that I've fixed it... the tube is still snug but it seems acceptable now. I bent the gaskey down to match the measurements of my good units useing a vise.
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