Yes, that's sort of what I have always figured. It is for form, not so much function with the latter being sort of lamely ascribed to oil-holding capabilities.

If anyone has pictures of a large scraped area, I would love to see them. Scraping a whole breach block can only be for looks as very little of it rides against the receiver and smoothness is not particularly important up to a point.

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BrentD, (Professor - just for Stan)

[Linked Image from i.imgur.com]