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Posted: 8/16/2010 12:02:09 PM EDT
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I recently built a 6.8 for my son.upon test firing, we noticed after he shot a round the trigger would not pull to fire a second shot.
Only after moving the safety a quater way toward safe we heard a click ,then moved the safety back to semi and it fired normally.we had to repeat this every time. His build consists of spike tac lower brownell parts kit timney trigger acs stock rock river 6.8 coyote upper How do I fix it? User Info IM User Email User |
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Sounds like the disconnector is not releasing the hammer.
Did you do a function test before firing it? http://www.ar15.com/forums/topic.html?b=12&f=2&t=78 Did you put in both sets of setscrews when you installed the trigger? Are they super tight? May need to adjust the disconnector setscrew. |
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Quoted:
how do I adjust set screw clockwise or counter clockwise Is it a 2stage trigger? Are you sure the disconnector spring is in correctly? The large end down inside the trigger housing and that its also seated in the trigger properly? (you should hear it "snap" into place) |
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Quoted:
how do I adjust set screw clockwise or counter clockwise If you look down into the trigger with the hammer up (not cocked) you will see two set screws. It's the set screw on the disconnector. You probably need to turn it SLIGHTLY clockwise, which will raise the forward part of the disconnector and reduce the amount of "grab" it has. Turn it too much and the disconnector won't catch the hammer and you could slam fire. That's why you HAVE to do function checks before doing any live fire. If you don't feel comfortable adjusting it, the factory (Timney) will propbably do it for you. It should be set at the factory. 
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The two screws on the sides of the trigger are not for adjustments. They put tension on the bottom of the lower to hold the trigger in place so the trigger and hammer pins can not walk out.
This is from the Timney installation instructions included with my trigger. "Using the enclosed hex wrench ,tighten the hex set screws in the gold colored housing. Tighten them both, then go back and snug them once more. (make sure these are very snug or the mounting pins could fall out) Then use the 2 enclosed hex screws and screw them into the gold housing on top of the screws you just tightened. These 2 screws are used to lock the housing screws tightly in place." Also included in the instructions. "If you find the trigger seems to be doubling (firing more than one round each time you pull the trigger) heat the small screw in the disconnector with a soldering iron and turn it counterclockwise until it barely touches the hook on the hammer as it re cocks." The answer to your problem may be to adjust the disconnector screw as stated above but it would be prudent to call Timney and verify first. I have called them several times. They are very helpfull. Dallas Jack |
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