STI Lawman 5.0 that should never have made it past QC. Too many issues to list.
I have had two CZ Custom pistols that were absolute junk: a Bull Shadow 2 and a Bull Shadow SP-01. The Bull Shadow 2's slide would bind so badly with the frame that after 4 shots I would have to hit it with a rubber mallet to release it. The Bull Shadow SP-01 just kept falling apart, along with the same slide-frame binding issue that plagued the Bull Shadow 2. The extractor flew-off after 92 rounds, rear sight fell off and the front sight was coming loose. I sent it back to CZ Custom for repairs and when I got it back, I traded it. Same with the Bull Shadow 2. I couldn't get rid of them fast enough.
Guncrafter Model 3. Couldn't shoot one magazine thru it without, at least, two malfunctions.