When I used this tool all I got was a fine "scribeline" circle in my bolt carrier where the carbon was removed. I then soaked my carrier in carbon remover overnight and tried the tool again, same results. It appears that the angle of the scraper blades and the angle of my bolt carrier are different. The scraper blades only contact a VERY small area in my bolt carrier. Doesn't do what it's suppose to do.
Pros: Built well
Cons: Doesn't work...
Would recommend: No
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