Here are some Luger ideas, maybe to explain why they still hold interest.
Lugers, as made in the first half of the last century, are pieces of art as well as functional. The form strictly follows function, according to the relevant art precept, and yet that utilitarian form is graceful in appearance and its mechanical operation.
Consider its styling, timeless, still beautiful after a century. Not many guns can stand up to this test of time. In fact, the reputation some hold of the Luger being finicky has to be seen in the context of a gun between 50 and 100 years old, still functoning. Where is a Glock going to be in 50 years, if anyone cares ?
A Luger must have the proper balance between its mainspring and magazine spring. Lugers that have been maintained, or at least left alone, for the years between, and have their springs in balance and the fit adjusted on their parts, can do very well. Most of the parts can be adapted from gun to gun, with a bit of fitting.
I have an Erfurt barrel and slide functioning perfectly on a DWM frame, with some modern reproduction parts in between, and make up an excellent shooting gun. Yes a Luger does have a slide of sorts, part of the barrel extension slides back on the frame while the breech is still locked, until chamber pressure is dropped, and the ramps have kicked the knee joint upward past their over-center alignment.
In fact, a Luger achieves a simpler and easier to understand mechanical design than any other autoloader, with all its linear trigger and sear train accessible and visible with just a simple field strip. No tools are needed, the only screws in a Luger are the two grip screws. Everything else is interlocked or pinned. A luger's firing pin can be removed with no tools, in just a few seconds, and replaced just as fast.
The safety is amazingly simple and efficient, and easy to understand. A Luger is a piece of art in its contrivance. It takes alot of expensive maching of the parts to have this ingenious machine work, and the gun was not the ideal war gun, as its inherent necessary precision was not easy to maintain in the mud and mess of wars.
The action itself, inhereted from the Maxim maching gun design, has lighter parts than a traditional slide operated semi-auto, and so cycles faster.
One reason, besides its inherent precision, for the Lugers accuracy is the recoil motion directly backward of the barrel/slide along the frame rails, without any ramping, tilting, or wiggling links or blocks.
I have six Lugers from Germany's Imperial era, all presently functioning fine when used with healthy magazines. The oldest one is a 1910.
The stainless steel Lugers made in Texas for Stoeger and Mitchell are not hardened properly or sufficiently in the critical areas needed to keep working for very long. I had three, trying to make at least one of them a usable reliable gun, but they were tearing themselfves up with each shot, and their workmanship and milling was sloppy compared to the quality maintained by every German manufacturer, over their 40 some odd years of production. Many of these stainless steel parts are not repaceable or interchangable with original Luger parts, as well.
It is easy to make the Lugers sucky sights work better, if you have a shooter you that is appropriate to modify, by just filing out, with a good jewelers file, the tiny rear V-notch to a wider U or square notch. Be patient, the metal in the rear link with its integral rear notch is extremely hard, and will take awhile to file out, if you want a good job. I've done that on three of my six Lugers, for the shooters. The front sight is just drift-adjustable, and replaceable with different height sights.
Everyone thinks Nazi when they see a Luger, but the gun has better origins in its American and Imperial German heritage, and was first in production long before the Nazi era.
THe P38 - now that's the Nazi gun, and by the way, the direct design ancestor of our present military Berettas.