If you recall my post about that barrel chopped Storm XT, I was having sear slipping issues on that rifle. I got a new sear from Craig the other day (thanks Craig) and replaced it this morning. It'll be a few hours before I can test it but it got me wondering.

In retrospect, I may have over polished the sear face when deburring the last time, and ended up trying to re-do the sear face to the point where I think I just totally fubared it. Hopefully this new sear does the trick. Now I have read a few instances where others have experienced sear slippage and I'd like to know what you guys think can also cause this problem?

I'm just preparing myself in the event replacing the sear doesn't work. I did discover that the trigger housing was being pulled downward when I bolted it in (there was a little slop where it slides into the compression tube) so I bent the tab up a little to where the pressure of the rear bolt would push the assembly upwards into the tube. Hopefully that along with the new sear gives it enough enagement to where it doesn't slip.

It sucks testing this thing but fortunately I'm aware of it so there's no surprises should the barrel decide to slam home. I'm even using tweezers to load this thing. I initially thought it could be the piston's sear hole, but I tested another piston that works perfectly in another rifle and that too would slip. If this new sear doesn't work, is it possible the factory tolerances on this gun is off just enough to create this problem? I'm not sure what that other part is called (perhaps the disconnector), but it's the one that sits just below the sear. Maybe that's the next thing I should look at but I'm not sure. What do you guys think?

Jon..i think you'll find you over polished the sear.dont polish it till its like a mirror.all your after is slicking up the edges and high spots.leaving some flaws holds lube.

Alright, I managed to get 1 round off. I cocked it and it held fine. I fired the round (the trigger was unusually light) and good to go. I tried cocking it again, and now it's slipping. I'll pull the barrel back and hear the sear pop up and as I start releasing it, it pops out and won't stick now. Suggestions?

the angles are wrong.try 2-5 degrees on the sear..dont worry about the minutes or seconds.
wait..this is a new saer yes??and the same problem still?

Yes it is a new sear and it's still slipping. I just pulled the entire trigger assembly apart (for like the 20th time) and think I may have found the problem. I'll find out in about 10 minutes...

I finally figured it out. Here's where the problem is:

http://www.airgunone.com/forums/picture.php?albumid=27&pictureid=144

The area where the trigger housing rests on the compression tube had too much play. When it was bolted down it resulted in the housing lifting off the tube and creating enough space to where the sear just wouldn't engage completely (or at the wrong angle).

I bent the front of the trigger housing tabs out a bit and now it's a tight fit:

http://www.airgunone.com/forums/picture.php?albumid=27&pictureid=142

I just fired off about 5 rounds and now the trigger pull feels normal and the sear isn't slipping anymore.

I have a question, what's this part called? Is it a disconnector?

http://www.airgunone.com/forums/picture.php?albumid=27&pictureid=145

Now time to scope her up and test her out...

Good eye Jon! What a pain in the ass though.

No kidding! I went through a sear and countless hours of troubleshooting as well as taking that thing apart and putting it back together dozens of times. The good thing is, the next time something like this happens we know another spot to look closely at.

you need a lathe and mill to go along with themj magic fingers you have. if you came lookin for a JOB at either of my shops i'd hire on the spot.:).and ta think..all this time i thought U was just a geek.:rockon: