Re: JP enterprise single stage trigger firing on reset
I've set several of the JP triggers up successfully. Please explain the steps you took to set the trigger up. The disconnector timing is the last step before setting up the safety.
JP has two single stage triggers. The original trigger has two set screws and the EZ trigger has one. Which do you have?
A good way to test if too much material was removed from the disconnector:
Detach the lower from the upper and hold the lower in your hand with the safety on "fire" obviously..
Pull the trigger and let the hammer fall, do not lift on the trigger. Keep optimal pressure on the trigger. Reset the hammer so the disconnector has hold of the hammer.
While continuing to hold optimal pressure to the trigger, take your thumb from the other hand and push down on the hammer and roll your thumb off the back, forcing the hammer to "pop" up with spring pressure. Do this a few times and let the hammer "pop" against the disconnector. If the hammer falls, your trigger is set up incorrectly and you have probably removed too much material from the disconnector. Start over with a new disconnector.
If you cannot get your hammer to fall using this test, then one or even both of your set screws are off and need to be reset.
Take the disconnector, safety and both set screws out. You should have red locktite on the set screws so some heat might be needed or you will may damage the set screws. Use a heat source to heat the trigger enough to melt the locktite so you can get them out.
With only the hammer (and spring), trigger (and spring) and trigger pins installed, start with the sear setting up front (short screw). Bottom that screw out (hammer should not fall when trigger pressed). Hold pressure on the trigger as if you were shooting while backing that screw out very slowly. When the hammer falls, back it out another 1/4 and let new locktite set up.
Later, put the rear set screw in (long screw) and let the trigger sit idle while not applying pressure. Run that set screw in and it will make contact with the lower receiver. Continue to screw it in until the hammer falls. Once the hammer falls then back it out exactly 3/4 of a turn. Let new locktite set up.
Start with a fresh disconnector and take material off as needed. When you hit the "sweet spot" you will know it. The trigger should reset properly without the hammer falling and should also pass the thumb test. If you fail another thumb test, too much material was removed. It is very easy to take too much material off. There are a ton of folks that stray from the JP triggers because you have to get them just right but once they are set up correclty, there is not a better trigger on the market. It has very little creep if you can even notice any at all.
Once you get the trigger set up, then set the safety back up if you have the JP adjustable safety as well. JP says to run that screw in until if makes contact with the trigger and then back it out 1/8 turn so the set screw does not rub the trigger. However, for me it's more like 1/16 of a turn if any at all. My safeties have absolutely no movement in them and they do not rub the trigger so that's where I leave them.
