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Posted: 1/21/2005 12:33:44 PM EDT
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I was out shooting my Ar today and the trigger would not reset on its own. I would have to push it forward after every shot. I noticed the pin was working its way out of the hole so I pushed it back in. I had to do that again after about another 70 shots. What should I do to keep the pin from moving around so much? Thank you DA |
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The trigger pin is held in place by the hammer spring legs engaging the groove on the pin. Check to be sure the hammer spring is properly installed. If it is correctly installed, you might be having a problem with a trigger pin with an undersized groove or more likely and more common usually with cheaper lower parts kits is you have a hammer spring made from oversized material that's unable to remain in the groove... www.ar15.com/content/guides/assembly/lower  edited for image |
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+1 Check that the trigger spring is installed properly. The leg of the spring should be horizontal coming off of the bottom of the coiled area and lay in the groove of the pin. The spring can be put in 180° off where the leg of the spring comes over the top and the trigger will still function but the pin will slide out. Don't ask me how I know this. 
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Here we have yet another example of a site supporting members providing clear, concise and competent direction in a gracious manner to a non-site supporting member. Hint. Hint. Hint. For comparison sake, you should try asking this question at your local gun shop. ETA site supporting members since smitty posted while I was composing. |
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Not really, but here is the link to the lower assy instructions where it states... Insert trigger retaining pin through receiver, trigger, and disconnector. The trigger pin has 2 grooves in it; one in the middle of the pin and one off to one side. It does not matter which way it is inserted, though common practice is to insert from left to right, with the groove to the left. Assy Guides |
I've always heard it didn't matter which way the pins were installed or to what side the grooves were positioned, so I've always made it a habit of installing from the left <non-eject> side of the lower with the grooves on the left... a bit obsessive/compulsive, I know...  Check out the link I posted above, as I recall the 'official ARFcom instructions' also say in left and positioned left... ETA... you beat me Smitty! I've gotta learn to type faster... |
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Thank you so much everybody. I took a closer look and it seemed everything was installed correctly, but the spring wasn't getting in the groove. I took the pin out and installed it with the groove on the other side and I think that will do the trick (I can't push the pin out w/o lifting the spring). Simple enough fix. But I did do it without removing the hammer and spring wich was a little tricky. But I used an elaborate lever and pully system with dental floss and a toothpick. My theory is: if it can't be fixed using anything within arms reach, it can wait 'till later. hanks And just because I like showing it off, here is the little one http://img.villagephotos.com/p/2004-12/912603/tromixsmall1.JPG |
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