HECKLER & KOCH HK4 4 CALIBER SET 9 MM KURZ, 6.35 MM, 7.65 MM AND 22 LR

A complete and increasingly scarce Heckler & Koch HK4 four-caliber set, manufactured in 1978 and offered in exceptional, near-new condition. The HK4 is one of the most ingenious service pistols ever produced, designed around a modular system that allows the user to change calibers simply by swapping barrels and recoil springs—no gunsmithing required.

This example is currently configured in 9mm Kurz (.380 ACP) with a 3¼" barrel, and includes all additional factory barrels and corresponding springs for 7.65mm (.32 ACP), 6.35mm (.25 ACP), and .22 LR, all boxed separately with the correct tool. The pistol is accompanied by its factory box, making this a complete and highly desirable package.

Condition is excellent, and the set appears new and unfired, with crisp finish, sharp edges, and no meaningful signs of use. Serial number 28XXX is consistent across components, reflecting a correct and original set as collectors want to see them.

A standout opportunity to acquire a complete HK4 four-caliber set—clever German engineering, full originality, and condition that is getting harder to find every year. Ideal for the HK collector or the enthusiast who appreciates innovative design executed to a very high standard.