AK DIAS (Drop In Auto Sear)

AK DIAS pictures and tutorial by troubleshooterBerlin on YouTube (http://www.youtube.com/watch?v=OMIIC_MIxMA)

"DESCRIPTION: Last Friday there has been a topic at AR15.com regarding an AK DIAS (drop in auto sear).
Since they deleted my topic regarding an AK DIAS (published today) promptly you are getting the info right here.
After reading the initial topic my conclusion was that there is no such thing (the matter registered or not is beyond this consideration). A search at the web resulted in the usual rumors: "There had been a guy (decades ago) who did something like that but never seen any blablabla... Somebody else claimed having done it but wouldn't release any info...
http://www.gunsnet.net/forums/archive...

All the other full auto conversions I've seen require drilling, welding, cutting parts of the guide rails etc. - what is of course not the meaning of "drop in".

Since I'm interested in facts rather than rumors and since in principle every semi auto selfloader can be modified to shoot full auto I decided to build my own device.
In the meantime some people told me they would consider it being a Lightning Link (LL) as it is known for AR15-rifles.
Since I was just dealing with the trigger assembly due to my AKM rate reducer topic
http://www.ar15.com/forums/topic.html...
all the necessary stuff was at hand.

Pictures:

http://img176.imageshack.us/img176/42...

http://img176.imageshack.us/img176/10...

http://img176.imageshack.us/img176/88...

Don't know if this is new, maybe somebody did this before - I simply wanted to see how it can be done and if it works as intended.
The task was to use the original parts to catch the hammer avoiding safety issues due to possibly improperly homemade parts. Should work no matter if full or semi auto bolt carrier. Should be possible to make with a minimum of technical equipment and as always as few and simple parts as possible.

In the following the trigger is pulled unless stated otherwise.
If the hammer has passed the front hook the left ear (of the hammer) pushes against the lever arm of the auto-sear spring thus creating a rearward push at the auto-sear.

So you could say the hammer generates the spring pressure which is pushing away the disconnector. If the hammer passes the front hook of the trigger on its forward move the auto-sear immediately turns forward into its starting position again.

If the front end of the auto-sear is released by the bolt carrier the rear end of the auto-sear turns downwards and pushes away the disconnector and the hammer will turn forwards and hit the firing pin. The auto-sear and thus the hammer will be released if the bolt carrier is about 1mm before its front position (3mm at the original auto-sear).

Don't know what else I should tell - there is nothing more than that.

Sorry guys - no blueprint or further specifications available (on the other side not really necessary at such a simple design).

For academic use only - observe your laws!

In Germany full auto conversion parts are free for sale. You can even own a semi auto gun and the corresponding full auto parts at the same time. But you are not allowed to install them. Important is what you actually do."