McMaster has shims of all thicknesses and diameters.
You might have to turn the outside smaller to get the right outside diameter with the right inside diameter.
The issue with shimming a barrel for index like that is you are often extending the headspace.
Watch that as well...
A better option would be to clock the barrel deeper by 7/8+ of a turn, then rechamber to correct headspace.
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Last edited by ar15barrels; 07-20-2013 at 12:49 PM..
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