Apparently the Lehigh conversion kits are off the market, but the one from Knight should work just fine:

http://www.knightrifles.com/209-conversion-breech-plug-M900044/

The main difference is that the Lehigh had a replaceable vent liner.

NOTE: This assumes that your Green Mountain rifle will accept the Knight parts...

Last edited by wildhobbybobby; 12/05/12.
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