Rollmark Repair

I was clearing out some old account messages and I came across these two images of Colt lower receivers that have had ‘rollmark repair’ done to them.

This process is done in the factory after an initial rollmark is applied with some type of defect occurring. To correct this, a thin layer of material is machined away and a new rollmark is applied. This leaves the small ridge that is pointed out by the blue arrows.

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