The Wolfspistole is a 26.5mm launcher based on the Leuchtpistole 34 Sturmpistole conversion. The Sturmpistole or Kampfpistole, was used as a multipurpose launcher and was frequently used to project modified stick grenade heads, as well as purpose built anti tank projectiles.

The Wolfspistole is based on the Leuchtpistole 42 model that was initially made of stamped sheet metal. The simplified design lends itself to 3d printing more easily than the original milled Leuchtpistole 34. There are no official Sturmpistole variants of the 42, but there are period examples of stocks or other parts fitted to make improvised Sturmpistoles.

This pack includes:
-The base model Wolfspistole, useable by itself
-The foldable launcher sight
-A detachable Stock
-A picatinny adapter for sights
-A picatinny stock adapter
-A prototype 26.5mm integral supressor
-Several DIY 26.5mm shells and projectiles
-Adapters for the DIY BN39 Stick Grenade
-Assembly Instructions and Bill of Materials

The Wolfspistole is a DIY 26.5mm flaregun compatible with standard commercially available flares.
It is not a firearm and there are no special legal requirements for it to be equipped with sights, a stock, or an integral supressor.
It is not intended to be used with 26.5mm adapters for pistol caliber ammunition. Attaching an adapter for pistol calibers to the Wolfspistole with a supressor or stock makes it an NFA item. The breech face is not intended to fire pistol ammunition.
If it is used to launch a destructive device it also would become a destructive device itself.