I have a Walther PPK, made by Interarms, purchased new in early 1999. A very good gun.
Shortly after buying it, I was searching Ebay for accessories. Ran across a fully adjustable rear sight for the PPK, new in the package, made by MMC (Michigan Machine Co.).
I recalled that the late gun writer Skeeter Skelton wrote about this PPK adjustable rear sight in one of the 1970s Shooting Times magazines. Well, won the bid at $50. And when I got the sight, it had a $74.99 price tag on it!
It's been on my PPK since. A sturdy, machined steel adjustable sight that is not much bigger than the original and doesn't catch on clothing. A wonderful accessory.
I went with the PPK because I wanted a pistol for self defense that was proven to be utterly reliable. My PPK is, even with hollowpoints. I understand that the earlier PPKs are not so reliable with hollowpoints.
It remains my coat and jeans pocket gun when I go into town (I live in the remote desert).
About eight years ago my cousin so admired my PPK that he bought one himself. He proceeded, in the space of a few years, to put 8,000 rounds through it!
He retired it when some little piece broke off, he told me, but it didn't affect safety or reliability. Not sure what broke but it was nothing critical. It still shoots reliably, though it's not as accurate as it used to be, he tells me.
He works at the firing range of a major city, and fired a box or two every weekend for years, in case you're wondering how he managed to put so many rounds through it. His is an interarms too.
I absolutely love my PPK. I just wish someone made some soft rubber grips for it, like they do the PPK/S. Or better yet, soft rubber grips with laser sight.
Skeeter Skelton wrote of someone -- Safariland? Bianchi? -- who made an experimental batch of soft rubber grips for the PPK, and he scored a pair. He put these on a stainless steel PPK as I recall, with the adjustable MMC sight.
That is a winning combination. Love the adjustable rear sight on mine, though it requires a very small allen wrench to adjust it. It's been on my pistol for more than 8 years, and endured about 2,000 rounds, and never lost its setting.
Mine's just a blued model, with the standard black plastic grips, but it's a reliable, accurate and concealable lil' beast.
You can have your chopped-down 9mms, .40s and .45s -- their recoil and blast puts me off, plus I've been reading on the net for some years that the shorter, lighter slide and frame can make them unreliable.
The PPK is proven. It's been a reliable, tough, little devil for 75 years. That's good enough for me!