Arent those the proof marks or the marks made by the tech who straightened the barrel at the factory. Ive seen a few stamps hidden by the barrel nut when ive removed a few factory barrels.
Brian
Arent those the proof marks or the marks made by the tech who straightened the barrel at the factory. Ive seen a few stamps hidden by the barrel nut when ive removed a few factory barrels.
Brian
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