Sig 522 trigger modification/improvement

[wellfedirishman]

This is an improvement of an idea I originally saw on AR-15.com, by user Rocker.

http://www.ar15.com/forums/topic.html?b=6&f=45&t=302189

My improvement is to leave the part of the spring that rests against the trigger (i.e., perpendicular to the rifle) long.

It should be about a half inch longer than the original Sig Spring. Then bend it down towards the underside of the rifle (i.e., the magwell) so it forms a hook around and down the left side of the trigger.

So looking at the trigger assembly from behind, on the right hand side you have the trigger spring (as normal), in the center the trigger, and on the left hand side you have the trigger spring going over the trigger and down the left side. This grips the trigger tight and won't slip off.

When installing, you have to bend the long trigger spring around a bit and put the trigger in, pin it through to the receiver. Then bend the long leg of the trigger spring fully around and down under the safety selector (takes some effort to do this), and put the selector in place and pin it on the left side as usual.

The improved trigger is great now, far superior to the original Sig trigger, and it resets the trigger correctly after each pull.





Of source, after making any trigger modifications, the owner should test it carefully (with no more than 2 rounds in a mag) until the owner is sure it it is firing and resetting the trigger correctly, and there are no misfires. If the owner has any malfunctions, the gun should be unloaded, safely cleared and taken to a competent gunsmith.

Legalese: Any trigger mods are done at your own risk and are entirely your responsibility. It's your gun, you are responsible for it.

[yasushi]

Nice post, I'll have to try it out over the weekend.
Thanks

[GM4spd]

[QUOTE

Legalese: Any trigger mods are done at your own risk and are entirely your responsibility. It's your gun, you are responsible for it.[/QUOTE]

Your disclaimer may help you but I am not sure about forums that allow
postings about this activity. It may be better to just take your trigger
to a competent smith and leave the forum out of it.On a side note,I
would expect SIG to void it's warranty for this type of mod.If Calguns has no
problem---I apologize. Pete

[Ivanhoe]

good job -

2 questions:

what were you unhappy with from the original AR15 modder's post?

Is the spring in the 2nd pic the "final" cofiguration, meaning there was no more shaping from this point?

Just clarifying, I can be thick headed with directions at times.

Rod

[wellfedirishman]

The spring in the original AR-15 post kept slipping off the trigger. It wasn't as stiff as the original SIG one, so didn't stay in place. Hence the need for improvement.

Yes, the figures above show the final version. Remember, when installing this, the long leg needs to be bent around (i.e. tightened) before you put the trigger assembly in the receiver. When the trigger is installed, then bend the long leg up and over and down towards the rear (tightening the spring, takes some effort) and put in the safety lever.

Disclamer (again): If you do this, it is at your own risk. If you are not competent with gunsmithing, don't mess with your gun. Get a professional gunsmith to do it for you. Use common sense.

If the Moderators take exception to this thread, please delete it.

[Ivanhoe]

looks great - thanks wellfed!

[Jessi]

I attempted this mod but now I can't get the sear to release the hammer. The sear moves when I begin to pull the trigger, but then it makes a click sound and stops moving halfway through the trigger stroke. The safety lever works fine. I seem to recall the reset lever had some spring tension before I took it apart, but now the tension is gone. Did I put it back together incorrectly, or lose a part during disassembly?

[Jessi]

I attempted this mod but now I can't get the sear to release the hammer. The sear moves when I begin to pull the trigger, but then it makes a click sound and stops moving halfway through the trigger stroke. The safety lever works fine. I seem to recall the reset lever had some spring tension before I took it apart, but now the tension is gone. Did I put it back together incorrectly, or lose a part during disassembly?

[Jessi]

I attempted this mod but now I can't get the sear to release the hammer. The sear moves when I begin to pull the trigger, but then it makes a click sound and stops moving halfway through the trigger stroke. The safety lever works fine. I seem to recall the reset lever had some spring tension before I took it apart, but now the tension is gone. Did I put it back together incorrectly, or lose a part during disassembly?

[Jessi]

I attempted this mod but now I can't get the sear to release the hammer. The sear moves when I begin to pull the trigger, but then it makes a click sound and stops moving halfway through the trigger stroke. The safety lever works fine. I seem to recall the reset lever had some spring tension before I took it apart, but now the tension is gone. Did I put it back together incorrectly, or lose a part during disassembly?