Friction Block

Rule303

Inactive
Greetings. I'm told that Friction Block is a useful barrel treatment. I'm also told that FB has disappeared, but that there is an automotive equivalent. Does anybody know a) anything about this and b) what the automotive equivalent is? TIA, R303.
 
In the past, I purchased S&W Friction Block from LBT. (Lead Bullet Technology) I don't know that they still sell it but you might write them & check.
 
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