The toggle action of the Luger is guaranteed to shake loose any commercially available target sight assembly attached to it within 10,000 rounds or thereabouts. This fact hasn't stopped German and Swiss gunsmiths from
mounting the likes of LPA sights on the rear toggle.
The Artillery Luger tends to be more tolerant of various loads owing to greater inertia of its reciprocating cannon assembly. Also, attaching the board stock tends to stabilize the frame in the recoil cycle to a similar effect. However, its sight radius is the shortest among the standard military issues, and the standard v-notch sight picture tends to inspire objections among shooters accustomed to the square notches of present day handgun sights.