I have an 18 inch shotgun barrel with " Remington Arms Co., Inc., Ilion N.Y., Made In U.S.A." stamped on the top. Below that there is "12 GA", "CYL", "33704", and "BJ" with what looks like an anchor next to it. There are threads and a ring on the breach end.
Can anybody tell me what model shotgun this belongs to?

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