I wish I knew more about the ASP. When my lawyer was going through one of his divorces in the late '70s, I had temp custody of most of his guns, and one of them was an ASP. Thought it was uber-cool and shot the heck out of it for the better part of a year.
But I never could get it to run all the way. Some stovepipes, but many failures to feed. Six o'clock jams, twelve o'clock jams, all sorts of feed stoppages. At the time I thought it was a magazine problem, but I never was able to find any other mags except the three he had with the gun, so I could'nt put it to the test. I do remember he paid what I thought was a huge price for that gun, two spare mags, and a really trick holster.
Playing with that gun caused me to buy the first 3913 I saw for sale.