Originally Posted By: Doverham

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Interestingly, the locks bear an AYA stamp.
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This is spot on to the subject of the network of parts suppliers all the gun makers depend on for the parts they need to make guns.

The original AyA (not the AyA of that name today) had its start as a supplier of parts to the gun makers, and initially made no shotguns itself. AyA specialized in complete locks, and later in barrels. Even after that earlier AyA began making guns under its own name it continued to make and sell parts for a major part of its revenue stream.

As I write this history is attempting to come full circle. Current day AyA, concerned with the status of the parts suppliers it relies upon for the parts it needs to make shotguns, has started to make its own barrels.