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Cooper Model 21 bolt -firing pin help- replacement?
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03-18-2023, 03:02 AM
Gabe221
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Join Date: May 2014
Location: TN
Posts: 109
My guess is the spring took set over 30 years of being cocked in the rifle…
I just got done replacing a spring in a M21 , that used to be chambered in 17MK4
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