Operating out of his home workshop in California, John Martz is best known for his alterations and upgrades of Luger and P-38 pistols, all of which are performed by him and often take several months of work. Fixed sights, with a blank chamber and the toggle marked "45 JVM ACP". The left side of the frame is marked "M S T R" ahead of the side plate and "JVM 29" underneath it. Matching numbers are present on the latch, side plate, sear, safety lever and trigger. Checkered grips. With a pair of "JVM" marked magazines and a "29 JVM" marked takedown tool.