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Old November 12, 2012, 12:08 PM   #1
Sweet Shooter
Senior Member
Join Date: June 17, 2011
Posts: 640
Chrome crown finishing

Looking into the birdcage on my unloaded, highly accurate SIG M400, I notice that the Parkerizing finish is retreating from the edge of the crown as I fire it more. Unless perhaps I just never really looked close enough before. I've also thought that perhaps this was carbon buildup that's getting blown away. Either way I see the chrome finish at the muzzle and it looks like it could be finished better. Obsessive I know as the gun shoots MOA.

Is there a way to tidy it up or should I leave well alone? I've read that chrome is a difficult crown to polish up with a regular lap.

Any experience/thoughts?

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