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This Ruger manufactured front sight blade is for the standard model Mark I semi-auto pistol with a fixed rear sight and a 4 3/4" or 6" long barrel and is in very good condition exhibiting a brownish blue mix with some specks of rust. (file photo)
Note: Ruger Mark I semi-auto pistols with the following serial numbers have been observed with this part:
No Prefix: 127144, 129129, 166765, 210887 & 451514
12-11122
17-33228
