[J. L. Lyon]

What is the purpose of the piece of metal attached to the barrel extension that the sear slides into. I've not seen this on any other Luger.

The pistol also has a second piece of metal added to the left side of the frame. It is anchored in a separate hole just behind the the hole for the trigger pivot pin, then runs across the frame, makes a U and then is fitted in a slot on the left side smooth plate. The slot is visible when you look at the left side of the pistol. Any comments would be appreciated on this one.