for some reason i can't understand where this spring is.
From the original post: "the slide lock spring can work its way out of its retaining groove in the left side of the locking block just above the disassembly lever."
Remove your slide. Hold your frame in your right hand. Look at the left front rail, just above the takedown lever, which is pointing toward 6 o'clock. The tiny silver spring (about the diameter of a common pin) is in a groove just under the left front rail, looking from the left side of your frame.