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Just a FYI if you plan on taking this apart for any sort of reason. I recently took mine apart to change the roll pin, and the safety bar has a 1mm ball bearing or smaller holding it in place. This bearing is under spring pressure, and it will fly if your not careful. I was lucky to find mine in the carpet, but it was very hard to spot. So if you decide to be brave this is very good to know, once apart I was able to smooth out the action with a light polish. The assembly is not as complicated as most say, I polished both sides of the trigger bar and inside the slide stop. I can say to me this made a big difference with the smoothness of the action, no grittiness. Sorry no pics. Good luck!
 

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Just a FYI if you plan on taking this apart for any sort of reason. I recently took mine apart to change the roll pin, and the safety bar has a 1mm ball bearing or smaller holding it in place. This bearing is under spring pressure, and it will fly if your not careful. I was lucky to find mine in the carpet, but it was very hard to spot. So if you decide to be brave this is very good to know, once apart I was able to smooth out the action with a light polish. The assembly is not as complicated as most say, I polished both sides of the trigger bar and inside the slide stop. I can say to me this made a big difference with the smoothness of the action, no grittiness. Sorry no pics. Good luck!

FYI had the same issue with the list ball bearing in the safety detent—lost two of them actually. Had to special order them and wait days for them. I put a caliper on the 2nd replacement bearing and can confirm it’s a 2mm bearing. You can get them in 100 packs on Amazon prime. Just a little FYI for everyone else out there beating their heads against the wall.
 
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