I have 1911A1 Remington .45 auto. After install Kart barrel, Infinity sear spring, Ed Brown hammer, sear and disconnector found that disconnector will not go in place when I release the slide real slow. I have to pull the trigger and release it so the disconnector will move in place with a click sound. How to fix it?
Check the center leg of the sear spring to see if it's laying too high on the disconnect spade. The end should be well below center. Check the disconnect to see that it falls out of its channel under its own weight. If it resets correctly when the slide goes to battery at full speed, then fails when it moves slowly, you may need to deepen the timing slot in the slide.
If everything checks out, we'll look at a couple other things.
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you may need to deepen the timing slot in the slide.
??
Walkalong... Remove the slide and flip it upside down. Near the rear, there's a shallow slot that looks like a keyway in the center rail, and in fact was machined with a keyway cutter. That's the area that the disconnect's head pops up into and lets it reset between the trigger stirrup and the sear. If it doesn't move high enough, the disconnector spade can't fill the gap between trigger and sear.
Other issues can cause the disconnect to fail to reset correctly, but ageni's noting that the gun failed to fire when letting the slide move forward slowly makes me suspect that the depth of the slot is the culprit.
FWIW... If the resetting of the disconnect comes with a distinct, audible "click"... the slot probably needs to be deepened a little anyway.
Brownell's sells a neat little scraper made just for that, but you can also make your own out of a lathe bit ground to shape. I don't care for the old meathod of just drilling it as found on a lot of old bullseye guns.
Quote:
There's a shallow slot that looks like a keyway in the center rail, and in
fact was machined with a keyway cutter.
Gotcha. I have had to slightly relieve one before, just did not know what it was called. I would get a "tick" when easing the trigger back with the slide on, but not off. A little measuring showed it to be the culprit. Thanks.