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Posted: 7/22/2013 2:15:44 PM EDT
| Whenever I I pull the trigger and hold it in, if I do a slowe/smooth reset, the hammer is falling forward. If I reset quickly it is catching. Any ideas? |
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The disco spring gets installed large coil side down into the back trigger slot under the disco tail.
When you are sure that the spring is installed correctly, then without touching the trigger, cock the hammer back until the hammer rear seat is as close to the disco as you can get it with the trigger untouched. The free gap between the disco sear and the hammer back sear should be in the .001 to .003" range (about that of a human hair). If you find the Free gap much larger, then the disco needs to be re-timed, and to do this, you will remove metal from the front/bottom of the disco where it seat against the front/top of the trigger. Work slowly with dry fittings along the way, and this will solve the hammer release timing problem to get the trigger front sear in the correct position when the hammer is released to catch it correctly. If fitting is beyond your skills, then get the supply on the phone to have the entire FCG replace, and hope that the problem is not in the receiver, requiring the new disco to be re-timed anyways. http://www.ar15.com/content/guides/assembly/lower/ |
Dano thanks for the tip. Solved the problem. Can't decide if I took too much off on the polish job of if this FCG is just that out of spec. Had one nasty bur on the sear face that took a while to take out.  Probably gonna throw a RRA 2 stage in anyways. Thanks again
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