Walther KPK Pistol at RIA

The Walther KPK was a modified version of the PPK automatic pistol made in very small numbers by Walther in hopes of winning a new military contract. Mechanically identical to the PPK, the KPK has a lengthened slide to effectively shroud the hammer, preventing it from catching or snagging on clothing or obstacles in the confines of an aircraft or armored vehicle.

Not very much is written about these pistols, and they never went into production (it appears they were made in hopes of spurring a military interest, rather than in response to a military RFP).