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Posted: Sun Aug 21, 2011 8:11 am
by jhalek90
I recently took this design:
Image
and turned it into this:
Image

This is just the fire control mec. The hammer is a cylinder, of steel, with a spring behind. It rides in a piece of copper tube, and hits a blowgun (300psi).

Posted: Sun Aug 21, 2011 10:33 am
by wyz2285
is that a trigger :scratch: and does that work for semi auto?
I feel stupid because I didn´t understand how that mechanism is going to work :oops:
can you show me the internals of your gun? thx

Posted: Sun Aug 21, 2011 10:35 am
by Gippeto
Want semi auto eh. :)

Two piece trigger/sear assembly is gonna be a bear to make work...if you find a way to do it.

You need a sear disconnect. Couple examples...will need some modification of your striker design to work.

http://www.bushmaster.com/anatomy_bushmaster.asp

Simplest one I've come across http://www.homegunsmith.com/cgi-bin/ib3 ... =3;t=27047

If you cannot view it, let me know and I'll transfer links to the pics.

Posted: Sun Aug 21, 2011 11:25 am
by ramses
The part that will catch the hammer on its way back with the trigger still pulled is called the disconnector. It really is a bear to get right, since if you make it the wrong size, it will either not catch the hammer on the way back, or release the hammer upon letting go of the trigger before the "normal" trigger sear is there to catch it.

Image

Posted: Sun Aug 21, 2011 1:09 pm
by wyz2285
@Gippeto
it´s better to be pictures, I can not open them :(

Posted: Sun Aug 21, 2011 1:29 pm
by Gippeto
Couple links from the thread.

Ready to fire:



Fired:


Posted: Sun Aug 21, 2011 2:31 pm
by wyz2285
that looks like a single action trigger, does the striker goes back to it´s initial position by it self?

Posted: Sun Aug 21, 2011 3:10 pm
by ramses
The ar 15 is a single action trigger. It is put into its cocked position every time by the bolt. The bolt is either moved backward by the charging handle (cocking the gun manually) or by the recoiling bolt as it moves back to chamber another round.

Posted: Mon Aug 22, 2011 3:52 am
by wyz2285
ah so it´s like a trigger from a gas blowback pistols...
it won´t work for me unless I radically change the gun`s design but it´s already half done :?
And looks like the trigger+striker of a revolver it´s just what i´m looking for :) but I didn´t find a clear diagram of how it works. can anybody show me one? thx

Posted: Mon Aug 22, 2011 9:22 am
by Gippeto
Try google images...."single action trigger mechanism"

Posted: Mon Aug 22, 2011 10:16 am
by ramses
Gippeto wrote:Try google images...."single action trigger mechanism"
I think he wants double action, but the same logic applies. :D

Posted: Mon Aug 22, 2011 2:28 pm
by wyz2285
I tried, only found complex and unreadable diagrams :evil:

Posted: Mon Aug 22, 2011 5:02 pm
by Zeus
wyz2285 wrote:I tried, only found complex and unreadable diagrams :evil:
I'm afraid that's firearms for you. Double action isn't too simple, all my books only have relatively complex designs. Out of my ~2.5GB of related files, I don't have any on double action hammers.

JSR, Gippeto, help please?

Single action is criminally easy to make, if you can live with having to cock a hammer for each shot until you can make a good double action trigger. It'll get you shooting quicker anyway.

And I'll try and simplify the two DAO mechs I have.

Posted: Mon Aug 22, 2011 5:08 pm
by jackssmirkingrevenge
wyz2285 wrote:And looks like the trigger+striker of a revolver it´s just what i´m looking for :) but I didn´t find a clear diagram of how it works. can anybody show me one? thx
Here.

Click on the trigger and make it work ;)

Posted: Mon Aug 22, 2011 6:23 pm
by saefroch
In that simulation, the trigger passes through the hammer when it recocks. Would it sill work as drawn?