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AR15.COM
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3/15/2011 5:59:02 PM EDT
For those of who own an SGL-31 (or 21 for that matter) and have access to a decent micrometer, I'm curious what the barrel diameter is at the gas block.  According to the chart here
http://www.legionarms.com/pages/Dimensions-%26-Plans.html
it's supposed to .590" for most AKs, but I'm getting a slightly smaller reading on my cheap Home Depot micrometer.

While you're at it, I'm curious to know the OD at the front sight base, as well.

thanks
3/16/2011 8:18:38 AM EDT
[#1]
I have an sgl21 and I came up with .592.  The FSB was .710 and the gasblock was .735.  
My micrometer might be a slightly off but it is a pretty damn good one.  
Its not digital so i did the readings multiple times but that is what I came up with.
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