I always wanted to inspect my .45 ML bore but couldn't find anything that fit ( years ago). I bought a bore light (CVA) but it was for .50 cal and larger. But upon inspection, I notice that most of the cylinder was less than .45.....so being the smart a$$ that I am, I carefully ground off the knurled part close to the lens...and voila. BTW, these are getting harder to find.






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