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Model 37 marking
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usmc1978
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August 8, 2025 - 11:59 am
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I recently bought a Model 37, 20 ga. Behind the trigger guard, on the extension of the receiver, it is marked “GM.” Can anyone tell me what this means?

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Bert H.
Kingston, WA
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August 8, 2025 - 3:31 pm
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It is an inspector’s stamp (after final assembly).

Bert

WACA Historian & Board of Director Member #6571L
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usmc1978
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August 8, 2025 - 3:57 pm
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Thanks!

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