House on Haunted Hill (1999)
Incorrectly regarded as goofs
Boom mic visible
Errors in geography
First, the pistols are all Sig Sauer P228 9mm which have plastic magazine wells which wouldn't be "welded."
Second, like all semi automatic pistols, the shells can be manually unloaded via the slide, and can even be fully disassembled without any need to access the magazine well.