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open or closed
- Thread starter kenjen
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A "closed bolt" gun means that the bolt is already forward and latched when the trigger is pulled. In a semi-auto, the shot will open the bolt, eject the empty casing, and close the bolt on a new round.
An "open bolt" means that when the gun is in the firing position, the bolt is - open! Pulling the trigger releases the bolt, which strips a cartridge from the magazine on the way by and fires it when the bolt latches. As it cycles back, it ejects the empty and then (in a semi auto) latches in place.
It's worth noting that the ATF decided that an open-bolt gun was "readily convertible" to full-auto and therefore anything not already on the books is Bad.
(Disclaimer: this is my understanding of it after not knowing the answer and looking it up for myself last week. If someone cares to further or correct my explanation, please feel free!)
An "open bolt" means that when the gun is in the firing position, the bolt is - open! Pulling the trigger releases the bolt, which strips a cartridge from the magazine on the way by and fires it when the bolt latches. As it cycles back, it ejects the empty and then (in a semi auto) latches in place.
It's worth noting that the ATF decided that an open-bolt gun was "readily convertible" to full-auto and therefore anything not already on the books is Bad.
(Disclaimer: this is my understanding of it after not knowing the answer and looking it up for myself last week. If someone cares to further or correct my explanation, please feel free!)
KurtC
Member
With a closed bolt, the cartridge is already chambered by the bolt. When the trigger is pulled, the firing pin is hit thru the bolt, hitting the primer.
With an open bolt firearm, the cartridge is still in the magazine and the bolt is locked to the rear by the trigger. When the trigger is pulled, the entire bolt moves forward, chambering the cartridge and instantly hitting the primer.
With an open bolt firearm, the cartridge is still in the magazine and the bolt is locked to the rear by the trigger. When the trigger is pulled, the entire bolt moves forward, chambering the cartridge and instantly hitting the primer.
BLACKHAWKNJ
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The first Marlin 22 semiautomatic-Model 50 (?)-fired from an open bolt, accuracy was poor, they changed to a closed bolt design. Open bolt is usually used in submachine guns and machine guns where speed of operation is more important than target accuracy.
venomballistics
Member
and dont forget avoiding cook offs in chatter guns too.
MKT
SWCA Member
Another open bolt trait is that the open bolt guns are usually of a fixed firing pin variety. I know the full auto Uzi's we trained with (for another, uhm, secretive agency) had fixed firing pins.
