I bought a used Gen2 G19 recently and am having light hits before & after the six part upgrade. I have replaced the following: New OEM Recoil spring New extractor GLSP00098 New trigger bar GLSP02303 New OEM Slide lock spring Vickers Tactical slide stop New FP safety & spring Extractor Dep. Plunger GLSP00112 Extractor Dep. Plunger Spring & bearing New FP GLSP00049 New FP spring New cups New FP spacer New channel liner The old channel liner was loose and I still can't get the new one to seat permanently to I have lightly emeried it & will use a 3/8" dowel tomorrow. I had light hits as well BEFORE gutting the internals and worte it off to Win. WB ammo. However, it did the same AFTER the parts upgrade and even on some Fed. BPLE. That has me worried. I have checked everything, even the slide lock. Everything looks great & appears to be in spec. Any ideas?