I was going to replace the whole trigger group to start, but I decided to try to smooth out (and thin out) the disconnector to see if it would do anything. I polished the sides and took off any sharp points. I did not touch the hook that engages the hammer. I fired 4 mags (all suppressed) this evening with no malfunctions. I will have to do some more shooting to see if that was it, but I was getting the problem one or two times per mag and sometimes three times. All this shooting was done with the same lot of XM193. I will probably order a few disconnectors, but I do want to put an SSA trigger in it. Thanks for all the suggestions everyone.
Jk

