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Posted: 8/18/2008 6:04:21 PM EDT
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Well I took off the handguards to a upper I just bought and they do not have heatshields. They are old 6 holed versions. Any idea who made handguards without heatshields? ffh |
Maybe they were switched out at some point. What does your FSB look like? Oly's are cast and very smooth and flat. If you put it side by side with another barrel you will be able to tell the difference right away. |
| Put a line along the length on a cleaning rod, and put on a nice, tight-fitting patch. Push the patch through the bore (allowing the rod to rotate, of course) and stop when it has made one full rotation. Measure how far the rod is sticking in the barrel. If you had to push it in 9 inches to get one rotation of the rod, then your twist rate is 1:9. |
Thanks! |
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