Edit again: What is with the firing pin safety on Kimbers? That sounds dumb to me. How does it work? Is it mostly transparent during use? What about taking the gun down?
I'll get some pics up soon.
The slide has a firing pin block installed, it prevents (in case of a 50 foot drop or an impact from a sledge hammer, or full and half cock on the hammer breaks) the firing pin from moving forward and hitting the primer when the grip safety is not depressed. When the grip safety is depressed, it moves that little pin up, moving the block out of position which allows the firing pin to strike the primer.
Sorry if that's a little confusing, I can explain it in person but in type, I suck
Okay, pics
Here's the underside of the slide, the block is pointed out by the pin
This is a bad pic, but it is supposed to show that the firing pin wont go forward without the block being pressed
And the frame, this shows "lifter" being recessed without the grip safety depressed
And how it raises with the grip safety
I was too lazy to do more than a field strip tonight, so I found a link that shows a pic of the part in question:
http://gunbot.wordpress.com/2010/04/23/kimber-1911-detail-strip/
You must put the piece back in order for the gun to work, it's not something you can get rid of. The trick is getting the sear pin alligned with the sear, disconnector, and that lifter. You do it a couple times, it's not bad.
As for sounding dumb, I can't argue, it was just an added safety feature. Some newer Kimbers have it, some don't (Desert Warrior for example).
Other brands have their versions too, Remingtons and Smiths use a blade style lifter, and I've taken apart a 90 series Colt (if I'm remembering right it was a 90 series, and 80 series has them too) that also used a blade style.