AR Sponsor
Posted: 12/18/2006 8:55:37 PM EDT
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Can someone throw a mike on the barrel extensions outside diameter for me? Or what is the hole diameter to be bored into the front of the upper for the extension to fit into? Thanks |
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Extensions measure from 0.9984" to about 0.9996". This is measured with a good mitutoyo 4.5 decimal place digital micrometer. I have measured dozens of extensions and most fall within this range. Extensions WITHOUT a barrel installed are usually smaller. The extension tends to stretch at the front due to being torqued on to the barrel. For this reason, the rear of the extension is usually smaller than the front by several tenths. |
AR Sponsor
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