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What's wrong with trigger group?

744 Views 7 Replies 7 Participants Last post by  knitepoet
First, I want to say that I just recently found this forum and I think it's great. There is a lot of great info shared here.

I bought a used complete trigger group lately that has a problem I've never had with a 10/22. It seems that it has all factory parts, and someone has tried to do a trigger job. I first thought it was OK. The pull is about 2 1/2 lbs., and it is very smooth with almost no creep. The trigger group passes all the safety tests I could think of, and all that are mentioned here. I did not notice the problem until I put it in a receiver and test fired it.

If you hold the trigger down when you fire the gun, the sear catches the hammer fine, but when you release the trigger it fires again. (Not a fun surprise the first time!) If you pull and release the trigger with no delay it functions perfectly.

The hammer and sear both appear to have been stoned, so I've already got a replacement hammer and sear, but I was just curious if anyone else had ever had a trigger group do this, and can you explain how it does this. If I replace the sear only, it fixes the problem and raises the pull to about 3 1/2 lbs.

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Some folks have paid to achieve that...

Awhile back some enterprising soul came up with a modification for the Ruger Mini-14 that would let the gun fire once when you pull the trigger, and again when you release it. The obvious intent was to double the effective Rate of Fire since each front-to-rear and back movement of the trigger finger releases two rounds instead of one.

The interesting thing here is that ATF gave the inventor a ruling that it was *not* a machine gun since the law defines a machine gun as (among other things) a firearm which fires more than one round by a single function of the trigger. While it may not intuitively be obvious, pulling the trigger is a function and so is releasing it. His invention (and your gun) therefore only fire one round for each function of the trigger.

Now whether or not yours does so safely is another question, but if the bolt is closed it would seem safe since this is a simple blowback operated firearm.

Of course if your intent is accuracy and not bullet-hose, then all of the above is nothing but interesting trivia.
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