to just call TKO or Clague, and order one. Both guys have a proven track record at SSR efforts.
The other thing would be to check out the smithing section of Silencertalk.com (http://www.silencertalk.com/forum/viewforum.php?f=10). These guys are _THE_ suppression experts in the world. And since airguns dont generate the heat and pressures that their pyro cousin do, the materials you can use is greatly expanded.
Making SSR devices is as much black magic as it is science...... keep us posted
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