Makes sense.... hence the letters on the slide that say,"Stainless Steel".
LOL! Yep. That used to be the way they would designate which was stainless and which wasn't.
Here's the kicker, apparently towards the end of last year, they took off the "Stainless Steel" on the newer slides being made, since they're all that way now. My 40c has a born on date of August 24, 2011 and it has that on the slide. My best friend's 45c has a born on date of Oct 11, 2011 and his slide doesn't say stainless on it.