Hi all, IMO lower price point guns imported from Spain in the 50's thru the 70's should be looked at with a bit of caution. Cosmetically, they may look great, but the internal parts should be checked. A lot of them had parts that weren't hardened properly, crudely finished and slapped together.
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Greg is partially right and partially wrong.
Small parts that are not hardened correctly do get into the supply chain of parts, and used to make shotguns. Its rare, but it happens.
But when it happens it doesnt just happen with low price point guns or to just some makers. And it's not limited to any specific period of time. It can happen to any maker and any gun regardless of price point or the year the gun was made.
Understanding all this requires understanding the artisanal nature of the Spanish shotgun. The shotgun makers dont, as a rule, make the parts they use to assemble the shotguns they put their names on. Rather there are small shops, each of which specializes in making some part or assembly, from which the makers buy the parts they need to assemble their guns.
Artisanal manufacturing does not scale up well or easily. When there is an unusually high demand from one or more shotgun makers for parts this underlying network of suppliers cannot keep up with the demand for more parts, faster. So they bring in untrained and inexperienced workers (usually family) to help increase the number of parts produced. This is the point at which we begin to see poorly heat treated, or completely untreated, parts delivered to shotgun makers and included in new shotguns.
When poorly heat treated parts get into the system they can end up at any gun makers shop, and in any gun regardless of price point. People who think they can avoid this problem by only buying from a maker with a name they recognize, or by only buying top price point guns, are asking to be disappointed. These folks have the same (small) chance of getting a gun with one or more soft part in it.
So whats to be done? Here are two simple answers.
New guns:
All the small parts that need to be hardened should be file hard. So if you have any concerns disassemble the suspect gun and hit each hardened part lightly with a file to verify it was properly hardened. If the file bites, the part needs attention.
Used guns:
Un-heat treated parts wear out fast. If youre buying a used gun that has been consistently used for forty or fifty years, and it still works, then the gun either had no problems or whatever problem existed were fixed long ago.