Diehl 122mm Training Rocket Enters Series Production for MARS 3

Technical Summary

Diehl Defence has confirmed series production of a new 122mm training rocket developed jointly with Elbit Systems Land, following live firings from the MARS 3 (Modular Artillery Rocket System 3) launcher — marketed by KNDS Deutschland as the EuroPULS — at the Bundeswehr's Altengrabow training area. The firing ends a roughly 30-year hiatus in German rocket-artillery training munitions production and restores a sovereign training-round supply ahead of MARS 3 fielding across the Bundeswehr and partner armies.

The round is a 122mm calibre unguided rocket using Elbit airframe heritage (drawn from the 122mm segment of the PULS family) with Diehl-developed propellant and warhead. The warhead is a spotting-charge configuration: a small pyrotechnic fill producing visible flash, audible bang and smoke at impact, allowing observers to score fall-of-shot without carrying High Explosive (HE) fill or generating significant fragmentation. The propellant was redesigned specifically to suppress thermal ignition of vegetation on dry ranges.

Analysis of Effects

The engineering significance of the round lies less in its ballistic performance and more in its hazard profile. Conventional unguided rocket training using live HE rockets — or high-capacity practice rounds with pyrotechnic fills of legacy design — has historically produced two recurring problems: dry-range fires from propellant plume and warhead flash, and unacceptable Unexploded Ordnance (UXO) recovery loads when fuzing or pyrotechnic initiation fails. Diehl's claim is that the new propellant and spotting-charge combination reduces both vectors sufficiently to permit use on Central European ranges where previous unguided rockets have been restricted.

Pre-firing aerodynamic validation was completed in Israel in 2025 and in Germany in February 2026, with low reported error angles during Altengrabow firings in early April. Range, accuracy specification (Circular Error Probable), and Net Explosive Quantity (NEQ) of the spotting charge have not been published.

Personnel and Safety Considerations

For ammunition technicians and range safety officers, three points are material. First, Hazard Division (HD) and Compatibility Group (CG) classification will need to be formally assigned for the propellant and warhead; until then, transport and storage categorisation cannot be confirmed. Second, reduced-hazard does not mean inert — the spotting charge remains an energetic fill with its own initiation system, and failed-to-function (FTF) rounds will still require Explosive Ordnance Disposal (EOD) recovery under normal range standing orders. Third, restart of German domestic rocket manufacture after a three-decade gap places renewed emphasis on Allied Quality Assurance Publication (AQAP) 2110 compliance, particularly around propellant lot acceptance and shelf-life testing.

Data Gaps

DATA GAP: spotting-charge composition and NEQ not disclosed. DATA GAP: HD/CG assignment pending. DATA GAP: fuzing arrangement (mechanical/electronic, safe-and-arm logic) not published. DATA GAP: production volume commitment and delivery schedule to the Bundeswehr not specified. DATA GAP: factory location within Diehl's German footprint not confirmed. DATA GAP: whether the round is qualified for Allied MARS 3/EuroPULS customers or is Bundeswehr-only at first fielding.

AI-assisted technical assessment based on open-source material. Not a formal intelligence product. Source reliability B / Accuracy 2 (NATO STANAG 2022) — drawn from manufacturer press material and specialist defence media with corroborating coverage.