This makes me want to replace my 70 series with the 80 series mechanism.
There is no Series 70 mechanism in the fire control group. Everything prior to Series 80 was the original design in that area...from 1910 until the Series 80 pistols were introduced in 1983.
"Series 70" means something specific that has nothing to do with safety. It's become a catch-phrase. A quick way of letting the buyer know that the pistol doesn't contain any lawyer parts.