In this topic: You name the guns you can't ever identify right.

[ManiacallyChallenged]

Pump Action Shotguns.
The page about telling them apart helps a bunch, but it causes the problem where I'm checking the page for the right gun, and it wasn't one of the big three.

Revolvers also, especially when one shows up that has abnormal grips that lead me to ID it wrong.

And M16A1/A2. I can't tell when an A1 has A2 handguards. I really can't.