I happened to luck into a NIB 40 caliber Green Mountain barrel assembly set up as a
Thompson Center/Hawken drop-in replacement. For who might ask, I knocked the
wedge out of my 28" factory 45 Hawken; pulled the barrel; dropped in the new 32" 40 cal
Green Mountain; and reinserted the wedge. Perfect fit.
Then I set out to clean it using simple BreakFree as a first-cut solvent.
Out came the blackest "stuff" I have ever seen -- and out came more black stuff,
and out came More black stuff,... and out came More black stuff..... 45 minutes
later (including acetone to try and cut through whatever was in there), I was still getting
dirty patches out of that barrel.
I have no doubt at all that the bore has been superbly protected/preserved from the GM
factory... because absolutely nothing could have gotten through whatever they coated it with.
Anybody got any ideas what they might have used?
Thompson Center/Hawken drop-in replacement. For who might ask, I knocked the
wedge out of my 28" factory 45 Hawken; pulled the barrel; dropped in the new 32" 40 cal
Green Mountain; and reinserted the wedge. Perfect fit.
Then I set out to clean it using simple BreakFree as a first-cut solvent.
Out came the blackest "stuff" I have ever seen -- and out came more black stuff,
and out came More black stuff,... and out came More black stuff..... 45 minutes
later (including acetone to try and cut through whatever was in there), I was still getting
dirty patches out of that barrel.
I have no doubt at all that the bore has been superbly protected/preserved from the GM
factory... because absolutely nothing could have gotten through whatever they coated it with.
Anybody got any ideas what they might have used?