'Bout

...How does launching grenades cause the op rods to break? The grenade launcher opens the relief valve on the gas plug when it is installed, which prevents the op rod from having full travel.
Well, yes... but. IIRC, the first grenade launchers used with the M1icon did no such thing, as the gas cylinder lock screw was not equipped with a relief valve.

...It has been over 50 years since I fired a grenade with an M1, but I can not remember if the op rod travel was enough to even eject the empty casing.
I don't either. I was too busy figuring where that training grenade had gone and being amazed that the recoil hadn't knocked me down. (Yes, we were taught to shoot grenades from the shoulder.)

Ben Hartley
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