Bob, There may be a way to determine this. Open the sight by pushing the button on the right side..slide the sight back..on a Navy sight the interior should be in the white. If it is in the white and perhaps either rusty or corroded OK. If it is fire blued or black it has achieved a temperature 5-600 degrees or higher.
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Jerry Burney
11491 S. Guadalupe Drive
Yuma AZ 85367-6182
l ugerholsterrepair@earthlink.net
928 342-7583 (CO & AZ) Year Round
719 207-3331 (cell)
"For those who Fight For It, Life has a flavor the protected will never know."
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