Carl Gustaf M42 20mm recoilless rifle

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	Weapon: Carl Gustaf M42 20mm recoilless rifle Type: Recoilless Rifle Country of Origin: Sweden Year Adopted: 1942 Caliber: 20x180mmR Action: Recoilless Gun Overall Length (mm): 1070.0 Overall Length (in): 42.13 Weight (kg): 6.00 Weight (pounds): 13.23 Effective Range (m): 2000 m Effective Range (yards): 2187.23

The Carl Gustaf M42 20mm recoilless rifle, developed in Sweden during World War II, was one of the early practical implementations of recoilless weapon technology. Designed by Hugo Abramson and Harald Jentzen at Carl Gustafs Stads Gevarsfaktori, the M42 utilized vented propellant gases to counteract recoil, making it significantly lighter and more portable than traditional artillery of its caliber. The weapon fired 20mm high-velocity projectiles capable of engaging lightly armored vehicles, bunkers, and infantry positions with precision and effectiveness.

Production of the M42 began in 1942, and several thousand units were manufactured, primarily for the Swedish Armed Forces. While it was not widely exported, the M42's innovative recoilless system influenced later designs globally. The rifle's straightforward design and ease of use made it an effective support weapon for Swedish infantry, filling a critical gap in their ability to counter armor and fortified positions during a time of heightened military preparedness.

Although the Carl Gustaf M42 saw limited action, its development marked a significant step in recoilless weapon technology. It gained notoriety as a forerunner to more advanced systems like the Carl Gustaf 8.4 cm recoilless rifle, which became a staple of infantry arsenals worldwide. The M42 demonstrated the practicality and potential of recoilless rifles, laying the groundwork for subsequent advancements in portable, high-powered anti-armor weaponry.