Some earlier guns also had the slot in the rib extension for the projection on the extractor to ride in to keep it from rotating, but didn't have the stop screw. Obviously, that version didn't need the guide pin. Another example of Dan Lefever constantly tinkering with his designs.

Solution: Be careful you don't lose your extractor... especially when you remove the barrels from the gun!

Voting for anti-gun Democrats is dumber than giving treats to a dog that shits on a Persian Rug