Quote:
Originally Posted by HKGhost
just make them. it's really easy to do. Use plastic from packages like those used for tooth brushes. Make a bunch but you'll only need 1-2.
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Thanks!
Gave it a go. Ended up with 2 of the original shims, and the plastic shim. Barrel nut can now lock the outer barrel down to the receiver. Zero wobble. If the plastic eventually fails, I'll track down some proper shims (or cylinder head gaskets as they're also called).