Hi all. I recently replaced my slide lock on my Colt MKIV Series 80 Combat Elite. Had it out at the range for the first time after replacing and had constant Failure to feed. Multiple times it was like when it cycled it just jammed the next round into the feed ramp. A few mags cycled no issues. Slide lock seems to lock back on an empty mag and drop the slide on a full one. But more mags than not it would FTF many times. Tap Rack sometimes solved the issue other times took some convincing to get the mag out and get it going again. Could this somehow be related to the new slide lock? Or maybe sheer coincidence? I maybe got through 60 rounds and eventually stopped shooting it as it clearly seemed suspect and was a constant issue. Never had this issue before at all! Any input greatly appreciated! Thanks in advance! 