Hungarian M-42 (42/48 M.) Stick Grenade

1. Overview

The Hungarian 42 M. hand grenade, and its post-war variant the 42/48 M., is a uniquely designed stick grenade that served as the primary hand grenade of the Hungarian Armed Forces from the late phase of World War II until the early 1990s. Designed by Captain Zoltán Vécsey, the 42 M. was developed in response to front-line demands from Hungarian troops fighting on the Eastern Front for a time-fuzed grenade that would function reliably on soft snow, soil, and wooded terrain — conditions where Hungary’s existing impact-fuzed grenades frequently failed. The grenade features an ingenious spring-loaded inertial firing mechanism unlike most other stick grenade designs and offers remarkable versatility, including the ability to stack multiple warheads and accept a fragmentation sleeve for defensive use.

⚠ SAFETY WARNING: All ordnance should be considered dangerous until rendered safe by qualified EOD personnel. Unexploded ordnance should never be handled by untrained individuals. Report all suspected ordnance to military or law enforcement authorities. This information is for educational and identification training purposes only.

2. Country/Bloc of Origin

  • Country: Hungary (Kingdom of Hungary / Hungarian People’s Republic)
  • Designer: Captain Zoltán Vécsey (also designer of the Hungarian 36 M. hand grenade)
  • Period of Development: Designed in mid-1942; production ordered shortly thereafter; deliveries began 1943, with large quantities reaching troops in early 1944
  • Post-War Production: Renamed 42/48 M. and placed back into production by the Hungarian People’s Republic from 1948 onwards, manufactured by Fémtömegcikk Művek (FTM)
  • International Proliferation: Limited — never experienced the level of proliferation of Soviet F1 or Chinese Type 67 grenades, though examples have been encountered in Syria and Yemen

3. Ordnance Class

  • Type: Hand grenade (stick type)
  • Primary Role: Anti-personnel; dual-role offensive/defensive
    • Offensive (standard): Blast/concussion with limited fragmentation from thin metal body
    • Defensive: When fitted with the SV-54 fragmentation sleeve, functions as a fragmentation grenade
  • Delivery Method: Hand-thrown; can also be emplaced as a static charge or improvised demolition device

4. Ordnance Family / Nomenclature

  • Official Designations:
    • 42 M. kézigránát (42 M. hand grenade) — original WWII designation
    • 42/48 M. kézigránát — post-war redesignation (1948 onward)
  • Related Items:
    • SV-54 fragmentation sleeve — cast iron sleeve that fits over the warhead for defensive fragmentation role
    • 36 M. hand grenade — predecessor impact-fuzed grenade also designed by Vécsey
    • 93 M. NF and 96 M. NF hand grenades — modern replacements that entered service in the 1990s
  • Training Variants:
    • Blue-banded training grenade (replicates actions and weight with inert fuze)
    • Yellow-banded throwing practice grenade (simplified weighted dummy, no mechanical parts)
    • Black rubber version with metal core (appeared in the late 1970s for throwing practice)
  • Manufacturer Markings: “FTM” logo (Fémtömegcikk Művek) stamped on the warhead top, with last two digits of production year

5. Hazards

  • Primary Hazard (Standard): Blast with limited fragmentation from the thin sheet-metal body
  • Primary Hazard (with SV-54 sleeve): Fragmentation from the cast iron sleeve
  • Explosive Fill: 134 grams of TNT
  • Lethal Radius (standard/offensive): 5–10 meters
  • Lethal Radius (with SV-54 sleeve): Significantly increased (specific radius not widely published)
  • Fuze Delay: 3.5 to 4.5 seconds
  • Unique Mechanical Hazard:
    • The 42/48 M. uses a spring-loaded inertial firing mechanism — the wooden handle is not fixed but is mounted on a tubular internal assembly under spring pressure. The act of throwing causes the handle to travel rearward relative to the warhead, driving the striker into the primer. This mechanism is unique and may not be immediately apparent to those unfamiliar with the design.
    • If the safety pin is removed and the grenade is dropped or subjected to sudden deceleration, the inertial mechanism may initiate
  • Stacking Hazard: Multiple warheads can be threaded together in a line-charge configuration. A stacked assembly multiplies the explosive hazard significantly.
  • UXO Considerations:
    • Live 42/48 M. grenades are seldom encountered outside Hungary but have been documented in Syria and Yemen
    • The spring-loaded striker mechanism may be under tension in UXO condition — the grenade may function if the safety pin has been removed and the assembly is disturbed
    • The TNT fill remains stable and hazardous for decades
    • The textile safety band and transport seal may have deteriorated, potentially leaving the safety pin as the sole safety mechanism
  • Environmental Degradation: The wooden handle can deteriorate from moisture and rot, while the metal head and explosive fill remain hazardous. Corroded metal may weaken the threaded connections.

6. Key Identification Features

  • Shape: Classic stick grenade profile — cylindrical metal warhead on a wooden handle
  • Overall Length: 194 mm (7.6 in)
  • Warhead Length: 76 mm (3 in)
  • Warhead Diameter: 48 mm (1.9 in)
  • Weight (standard): 310–344 grams (varies by source)
  • Weight (with SV-54 sleeve): 744 grams
  • SV-54 Sleeve Diameter: 63.5 mm
  • Body Material: Sheet metal warhead; wooden handle
  • Handle Construction: The handle is NOT fixed — it is mounted on a tubular internal assembly and held under spring pressure against the warhead head. This is a critical distinction from other stick grenades.
  • Safety Pin: Secured with a textile band and a transport seal (wax or wire)
  • Striker Firing Ring: Metal ring affixed to a cap at the base of the handle
  • Color/Markings:
    • Live: Red bands (3 horizontal)
    • Training (functional): Blue bands (3 horizontal)
    • Throwing practice: Yellow bands (3 horizontal)
    • FTM manufacturer logo and year stamped on warhead top
  • Threaded Connections: The top and bottom of each warhead are threaded, allowing warheads to be screwed together in a stacking/line-charge configuration
  • Distinctive Features:
    • The sliding handle mechanism (handle moves relative to warhead under spring pressure)
    • Textile safety band wrapped around the handle securing the safety pin
    • Threaded warhead top and bottom for stacking

7. Fuzing Mechanisms

  • Fuze Type: Spring-loaded inertial striker with pyrotechnic time delay
  • Arming Sequence:
    1. Remove the transport seal (wax seal or wire)
    2. Unwrap the textile safety band from around the handle
    3. Remove the safety pin — the grenade is now armed
    4. Throw the grenade: upon the throwing motion, the handle’s inertia causes it to travel rearward relative to the warhead (maximum travel ~20 mm). Two internal springs then push the handle forward, driving the striker through the thin aluminum of the tubular fuze inlay to impact the percussion cap.
    5. The percussion cap initiates the pyrotechnic delay column
  • Delay Time: 3.5 to 4.5 seconds
  • Detonation: The delay column burns through to a detonator that initiates the TNT main charge
  • Safety Mechanisms:
    • Safety pin (removable)
    • Textile safety band wrapped around handle (secures pin)
    • Transport seal (wax or wire — indicates grenade has not been tampered with)
    • The inertial mechanism requires a throwing motion to function — static grenades with the pin removed theoretically will not self-initiate unless subjected to shock or impact
  • Re-safing: If the grenade is not thrown after removing the pin, the safety pin can be reinserted and the textile band rewrapped. The broken transport seal should be replaced with wire.
  • Self-Destruct/Self-Neutralization: None

8. History of Development and Use

The Royal Hungarian Army entered World War II equipped with domestically designed impact-fuzed hand grenades. In late 1941, reports from troops operating on the Eastern Front identified critical shortcomings: impact fuzes would detonate prematurely when thrown against tree branches in wooded areas, and failed to function reliably when landing on soft snow or soil. Impact fuzing also limited effectiveness when throwing grenades through vehicle hatches or building windows, as sufficient impact force was not always achieved.

The procurement department tasked Captain Zoltán Vécsey, designer of the existing 36 M. hand grenade, with developing a new time-fuzed weapon. Vécsey presented his unique design in mid-1942, featuring an innovative spring-loaded inertial striker mechanism that distinguished it from virtually all other stick grenade designs worldwide. Brief trials gave positive feedback, and production was ordered at companies including Elzett Vasárugyár Rt. (already a Messerschmitt supplier). Deliveries began in 1943, with large quantities reaching front-line troops in early 1944.

The 42 M. was instantly popular with Hungarian soldiers. The time fuze solved the problems identified on the Eastern Front, and the grenade’s versatility — including the ability to stack warheads and accept a fragmentation sleeve — made it adaptable to multiple tactical situations. Notably, it was never intended to replace other grenade designs but rather to complement them.

After World War II, the newly-formed Hungarian People’s Republic placed the grenade back into production as the 42/48 M. This was an unusual decision, as most Warsaw Pact nations adopted Soviet grenade designs. Hungary’s choice reflected the Soviet Union’s unwillingness to provide hand grenade production licenses and the inherent quality of Vécsey’s design. Production was assigned to Fémtömegcikk Művek (FTM), and enormous stockpiles were built during the early 1950s.

The 42/48 M. saw significant combat use during the Hungarian Revolution of 1956, where it was employed by both Hungarian military units and civilian fighters. The grenade’s stacking capability proved particularly effective for immobilizing Soviet tracked vehicles by blowing off their tracks.

The massive stockpile from the 1950s production lasted the Hungarian Armed Forces for decades. In 1990, the need for modernization became evident, and the 42/48 M. was progressively replaced by the 93 M. NF and 96 M. NF hand grenades. Most remaining stocks were destroyed, with a substantial number rendered inert and sold to collectors.

9. Technical Specifications

ParameterValue
Overall Length194 mm (7.6 in)
Warhead Length76 mm (3 in)
Warhead Diameter48 mm (1.9 in)
Weight (offensive/standard)310–344 g
Weight (with SV-54 sleeve)744 g
SV-54 Sleeve Diameter63.5 mm
Body MaterialSheet metal (head), wood (handle)
Explosive FillTNT
Fill Weight134 g
Fuze TypeSpring-loaded inertial striker, pyrotechnic delay
Fuze Delay3.5–4.5 seconds
Lethal Radius (standard)5–10 m
Lethal Radius (with SV-54)Significantly increased

10. Frequently Asked Questions

Q: How does the 42/48 M.’s firing mechanism differ from other stick grenades like the German M24? A: The M24 uses a pull-cord friction igniter — the user actively pulls a cord to initiate the delay. The 42/48 M. uses a spring-loaded inertial mechanism — the act of throwing causes the handle to slide rearward due to inertia, and internal springs then drive the striker forward into the percussion cap. This is a passive system that arms automatically during the throwing motion, requiring no separate arming action beyond removing the safety pin.

Q: Can the grenade be re-safed after the safety pin is removed? A: Yes. If the grenade is not thrown after removing the safety pin, the pin can be reinserted and the textile band rewrapped. However, the broken transport seal should be replaced with wire to indicate that the grenade has been armed and re-safed. This is unusual for a hand grenade — most grenades with removed safety pins cannot be reliably re-safed.

Q: What is the stacking/line-charge configuration? A: The warhead features threaded connections on both the top and bottom, allowing multiple warheads to be screwed together in a linear chain. This creates a line charge that is particularly effective for clearing barbed wire, breaching light fortifications, or immobilizing tracked vehicles by detonating against their tracks. During the 1956 Hungarian Revolution, this technique was used effectively against Soviet armored vehicles.

Q: Why did Hungary continue to use a domestic grenade design instead of adopting Soviet grenades like other Warsaw Pact nations? A: The Soviet Union was unwilling to provide Hungary with a license to produce any Soviet hand grenade design. Rather than simply importing Soviet grenades, Hungary chose to continue production of the proven 42 M. design, redesignated as the 42/48 M. This was one of the few examples of a Warsaw Pact nation maintaining a domestically-designed infantry weapon when Soviet alternatives were available.

Q: How does the SV-54 fragmentation sleeve work? A: The SV-54 is a cast iron sleeve that slides over the warhead of the 42/48 M., converting it from an offensive blast grenade to a defensive fragmentation grenade. It increases the grenade’s weight from approximately 344 grams to 744 grams and significantly increases the lethal radius through the production of cast iron fragments upon detonation. The sleeve was introduced in the late 1950s to extend the tactical versatility of the grenade.

Q: Where might the 42/48 M. be encountered as UXO today? A: Live 42/48 M. grenades are seldom encountered outside Hungary, but limited examples have been documented in recent years in Syria and Yemen. Within Hungary, specimens may be encountered at former military training areas, storage sites, and locations associated with the 1956 Revolution. Most remaining stocks were destroyed during the 1990s phase-out, but inert and collector examples circulate widely.

Q: Why is the 42/48 M. design considered obsolete? A: The design is considered obsolete for several reasons: the spring-loaded inertial mechanism is needlessly complicated compared to modern striker-release fuzes; the stick grenade configuration has a poor ratio of explosive fill to overall volume and weight; and the cast iron SV-54 fragmentation sleeve provides less concentrated and predictable fragment dispersion compared to modern pre-formed fragmentation designs.