How do they convert auto guns to semi auto?
In canada it illegal to own a gun thats full auto. So there is the CZ 858 looks almost like an AK 47. This gun is originally full auto/semi auto. But arnt they stupid? Cant it be easily again converted to full auto, I know its not worth it because its like what? a hit load of time in jail. But people Can easily convert it to full auto.
Oh my question is how do they convert it to semi auto?
To make rifles semi-automatic, they generally just remove the auto sear. (Different than the sear... a sear is one thing, an auto sear is another.) A machine gun will have an auto sear and a sear. A semi-automatic only has a sear.
Because of the "once a machine gun, always a machine gun" position of the ATF in this country, they also destroy the receiver and replace it with one that lacks the proper holes to accept an auto sear.
It is actually very easy to make a semi-automatic fire fully automatic. However, most of the garage gunsmiths that do this don't do it correctly.
In a normal machine gun.... It is ready to fire, except you haven't pressed the trigger so the sear is holding back the hammer. When you fire it, the hammer is c0cked by the action, but since you're holding down the trigger so the sear can't block the hammer, the autosear catches the hammer. If it is in full-auto mode, the autosear is tripped as the action closes again, allowing the hammer to drop from a full swing. The autosear is basically just a disconnect that interfaces with the bolt.
Whenever someone illegally converts a semi-automatic to fully automatic, they don't add an auto sear, because that would require too much intelligence and effort. What they do is simply remove or modify the disconnect so that it no longer catches the hammer during cycling. As a result, the hammer "follows" the bolt forward. Sometimes, quite often actually, this will result in the weapon firing fully automatic... in a crude way. It isn't as reliable as if it were done properly, because the firing pin is not receiving a full swing of the hammer... ignition isn't reliable.
So....
To make an auto semi auto doesn't require much effort mechanically... Remove the auto sear, and activate the disconnect and all is well.
Legally, the auto sear must be removed and a new receiver added, so it is actually difficult to accomplish legally.
To make a semi auto full auto, it is easy to do it in a very crude way.
To make a semi auto full auto properly, it takes a lot of effort, equipment, time, and knowledge.
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