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M-7 LAUNCHER

for M1 Rifle

United States

 

BRIEF OVERALL HISTORY

The M7 was the first rifle grenade launcher adopted for the M1 Rifle. While spigot type rifle grenade launchers had been developed for previous rifles, the M1 Rifle presented a new challenge with its semi automatic function. Merely placing a launcher on the muzzle would over gas the operating system likely causing injury and failure of the rifle. A way to vent excess gas was needed. This was done by the adoption of a vented gas cylinder lock screw that was opened when the launcher was attached. This new lock screw and the M7 launcher would be adopted in 1943 and serve through WWII.

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MANUFACTURER MARKINGS

This launcher was made by Knapp-Monarch (KM), which is marked on the underside of the latch arm along with the model (M-7 Launcher) and what rifle it was for. Interestingly, Knapp-Monarch was a small appliance manufacture, making things such as irons, toasters, and fans.

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US ORDINANCE STAMP

On top of the latch arm is a flaming bomb US Ordinance stamp. My guess is this is an acceptance stamp. If you know, send me a message.

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W OR M?

On this example, there is either a W or an M stamped on the underside of the launcher spigot as it is attached to the rifle. If you know what this is, send me a message.

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POSITION MARKINGS

The numbers 2 through 6 mark position rings on the launcher. These are used in determining range along with the angle of the launcher and the type of munition. The numbers correspond with the inset ring above each number.

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HISTORICAL PHOTOGRAPHS

03e76d3893ac33e383db70ab6d407ff7--high-a
 

RESOURCES

War Department 14 Feb 1944

By Michael Popernack

History in Firearms