Oooo-ooo--this is nice
- Thread starter Klunk
- Start date
- Location
- West coast of Vancouver Island
Note BIG Marstar logo
$3195.00 (ouch...take the pain)
Even fires from an open bolt like the originals
Guess Im gonna hafta sell some schtuff.......
Yes - The MkB-42 was an open bolt gun...then one was modified to fire from a closed bolt and Lo-n-Behold...no cook-offs
So all the MkBs were recalled to have this mod done...but by then the MP-43/1 and MP-44 were in full production
I almost wish it was closed bolt...its really better for accuracy
Coyote Ugly
CGN Ultra frequent flyer
Open and Closed Bolt Definition:
Closed bolt operation for the MP44
The bolt is locked in the breech with a round chambered.
For example, when the trigger is pulled it releases the "hammer" which strikes the "free floating" firing pin and fires the bullet. The bolt then gets blown back by gas and then pushed forward again by the main spring, along its way it will strip another round from the magazine and chambers it.
If the selector is set to semi-auto, the trigger would need to be released and then pressed again to fire another round.
If the selector is set to full-auto then the process would repeat itself until the trigger is released.
The open bolt works differently.
The bolt would be cocked in the rear position and held in place by a sear. The sear is controlled by the trigger. If the trigger is pulled the sear drops and vice-versa. The bolt on an open bolt weapon is milled in such a way that it has a sear catch on it. It also has a fixed firing pin that does not move. Since the firing pin is "fixed" it is sometimes machined right into the face of the bolt and if it wears the entire bolt would need to be replaced. They are not all like that but some are i.e. a STEN bolt and I believe an MP40.
The heavy open bolt design needs to strip a round from the magazine, then chamber the round, and then fire it all in one motion. For this reason an open bolt weapon is not very accurate in the semi-auto mode. The advantage to the open bolt besides simplicity, is the fact that it wont "cook" a round off since there is no round in the chamber when not being fired. A closed bolt system can have a round chambered and if hot enough it could cook a round off.
Closed bolt operation for the MP44
The bolt is locked in the breech with a round chambered.
For example, when the trigger is pulled it releases the "hammer" which strikes the "free floating" firing pin and fires the bullet. The bolt then gets blown back by gas and then pushed forward again by the main spring, along its way it will strip another round from the magazine and chambers it.
If the selector is set to semi-auto, the trigger would need to be released and then pressed again to fire another round.
If the selector is set to full-auto then the process would repeat itself until the trigger is released.
The open bolt works differently.
The bolt would be cocked in the rear position and held in place by a sear. The sear is controlled by the trigger. If the trigger is pulled the sear drops and vice-versa. The bolt on an open bolt weapon is milled in such a way that it has a sear catch on it. It also has a fixed firing pin that does not move. Since the firing pin is "fixed" it is sometimes machined right into the face of the bolt and if it wears the entire bolt would need to be replaced. They are not all like that but some are i.e. a STEN bolt and I believe an MP40.
The heavy open bolt design needs to strip a round from the magazine, then chamber the round, and then fire it all in one motion. For this reason an open bolt weapon is not very accurate in the semi-auto mode. The advantage to the open bolt besides simplicity, is the fact that it wont "cook" a round off since there is no round in the chamber when not being fired. A closed bolt system can have a round chambered and if hot enough it could cook a round off.
Hard to do with ONE 5 shot mag....But Im gonna try!!
This description is correct for many submachineguns.
This rifle is somewhat different.
This is a locked breech, gas operated rifle, with a firing pin activated after the bolt is locked.
There are many other firearms that are open bolt, with a firing pin that is struck after the breech is locked - the Bren would be a well known example, the BAR another.
Hey Klunk,go buy it and I'll babysit it for ya.Don't you have a tank
that won't start
take real good care of it.
Everyone wants to baby-sit for me....they just dont know Fang and Spot are part of the deal
The MP38 and early MP40 have a separate firing pin attached to thje front of the return spring assembly. Late-war MP40's have the pin machined into the bolt face.
