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The Zastava M70A is a clone of the old Soviet TT33 Tokarev pistol, with the addition of a manual safety, a slightly longer grip fitting a slightly longer magazine (by one round), and being chambered in 9mm Luger. This one has a set of pretty wood grips, as opposed to the more mundane looking plastic grip panels they come with from the factory.
To me these are improvements across the board, as the original Tokarev pistols had no safeties and were outright not safe to carry with a loaded chamber. Soviet doctrine with these pistols was to simply carry it with a loaded magazine and an empty chamber, and then to cock on the draw, like the Israelis do, but before modern Israel existed. They also have a half-cock notch, which some figure is safe enough for a loaded chamber, but I wouldn't trust it.
This comes to some curiosa with original Tokarev pistols imported to the United States; import laws demanded a couple of things to allow them in, that they had the importer's name stamped on the gun, that they had the caliber stamped on the barrel (most guns already do), and that it had a safety, which obviously was an issue. What follows is that importers would simply modify the pistols themselves to add manual safeties to them, allowing them to be imported.
These importer safeties are a crazy gamble, some companies did a decent job with these, others very much did not, and it doesn't get around the fact that the pistol still isn't going to be any more drop-safe, most of these safeties just blocked the trigger from moving.
The M70A, being redesigned at a factory to feature a manual safety, and being a pistol currently made and sold in the west, is actually drop-safe.
I hear a lot of mixed opinions about how functional these pistols are, but generally they're quite cheap.