7.5 cm FK 16 nA

7.5 cm FK 16 nA
Name	7.5 cm FK 16 nA
Origin	German Empire
Type	Field gun
Service	1918–1945
Used by	German Empire; Wehrmacht; Reichswehr
Designer	Krupp; Rheinmetall
Design date	1917
Manufacturer	Krupp; Rheinmetall-Borsig
Production date	1918–1926
Weight	~1,520 kg
Length	4.28 m
Caliber	75 mm
Barrel length	2.7 m (L/36)
Cartridge	Fixed QF 75×190mm R
Rate of fire	8–10 rpm
Max range	10,800 m
Crew	6–8

7.5 cm FK 16 nA is a German field gun developed as an incremental improvement to earlier 75 mm artillery during World War I, later modernized for interwar and World War II service. It represents an adaptation by firms such as Krupp and Rheinmetall-Borsig to extend the life of pre‑1918 materiel for the Reichswehr and later the Wehrmacht. The type saw use in training, secondary fronts, and fortification armament through 1945.

Development and design

The gun originated from the necessity to upgrade the 7.7 cm FK 16 and earlier 7.7 cm FK 96 n.A. designs after experiences on the Western Front exposed shortcomings against entrenched positions and modern counterbattery fire. Engineers at Krupp and Rheinmetall undertook redesigns to improve range, recoil, and mobility; the project involved personnel and doctrine debates within the German General Staff and input from field units in the German Army (German Empire). The redesign incorporated a new steel tube, updated hydro-pneumatic recuperator developed under the supervision of technical directors associated with Rheinmetall and tests overseen by the Artillerieprüfungskommission. The carriage was modified to a split trail in some proposals discussed by representatives of the Reichswehrministerium during the Treaty of Versailles constraints, while production choices were influenced by postwar industrial politics involving Krupp and the Weimar Republic.

Technical specifications

Designed with a 75 mm caliber and a barrel length approximately L/36, the gun used a fixed QF cartridge roughly 75×190mm R, and featured a recoil system derived from earlier Feldkanone developments. Calculated mass, balance, and crew stations were refined in trials at sites linked to Krupp and field tests reported to the Heereswaffenamt. The carriage provided limited elevation and traverse typical of late‑war German field guns, and the sighting equipment reflected optical standards influenced by optics firms and institutes connected with Zeiss and military ordnance bureaus. Manufacturing records from Rheinmetall-Borsig and surviving workshop notes from Krupp show component interchangeability intended to simplify logistics under Reichswehr budgets.

Operational history

Introduced late in World War I, the gun entered service with units on the Western Front and in rear area formations assigned by the Oberste Heeresleitung. Postwar inventories were retained by the Reichswehr and later reallocated to the Wehrmacht during remilitarization; deployment records cite use in training schools at locations such as Kummersdorf and in fortress batteries along the Maginot Line opposite sectors held by French Army forces. During the Invasion of Poland (1939), some were mobilized for second‑line duties supporting corps rear area commands and units attached to the Heer. In the Battle of France, remnants equipped occupation garrisons and coastal defense units coordinated with services of the Kriegsmarine. On the Eastern Front, scarcity of modern pieces led to employment in static defensive roles and in ad hoc artillery groups under the Oberkommando des Heeres, while others served with training commands for replacements.

Variants and modifications

Several modernization programs produced variants identified in workshop ledgers from Krupp and Rheinmetall. Modifications included rechambering for new charges, strengthened trails, and altered equilibrators influenced by practices developed at the Heeresversuchsanstalt. Some pieces received pneumatic tires and sprung axles during the 1930s motorization efforts championed by proponents within the Wehrmacht high command, enabling limited towing by early motor transport such as vehicles from Krupp and Magirus. Coastal and fortress modifications added heavier recoil buffers and modified elevation stops for high‑angle fire in installations coordinated with fortress engineering units of the Heer and local garrison commands.

Ammunition and performance

Ammunition types in service records include high‑explosive, shrapnel, and training rounds compatible with the fixed QF 75×190mm R specification, with ballistic tables maintained by the Heereswaffenamt and firing doctrines disseminated through schools at Kummersdorf and other training centers. Performance data from firing trials list a maximum effective range near 10,800 m and a practical rate of fire of 8–10 rounds per minute under ideal conditions; these figures appear in ordnance memos circulated among Reichswehr staff and archived in production files of Rheinmetall-Borsig. Ammunition logistics tied to depots controlled by the Heeresmunitionsverwaltung influenced tactical employment in both static and mobile roles.

Surviving examples and legacy

Surviving examples are preserved in military museums and outdoor displays in collections associated with institutions such as the Deutsches Panzermuseum and regional museums in Germany and Poland, often cited in catalogues of the Bundeswehr museum holdings. The type is studied by historians of German military history and by restoration groups linked to Militaria collectors and technical historians from universities with arms research programs. Its legacy includes influence on interwar German artillery modernization debates and lessons incorporated into later designs fielded by the Wehrmacht during World War II.

Category:Artillery of Germany Category:Field guns