I sent a fully functional but rusty Springfield in for one of these fancy new teflon/poly finishes. The gun now looks great but won't work. Even after two hundred rounds. It will not lock the slide open on an empty mag. It will not feed the first round from the mag. Jeez. First, the slide lock is binding or draging and won't go fully up enough to engage the cut out. I've tried replacing the pin, and the little spring, gently bufing the slide lock where it engages the pin, etc, etc. Both detent pins don't seem to be binding in the tube. As far as failure to feed...I checked the extractor thinking somehow the tension changed. Looks the same. The mags are all the same, nearly new Wilsons that worked just fine early. Ditto for the ammo...no change. Man, I should have lived with the rust! Except that it was pretty bad and even in some of the internals. Any tips will be appreciated. Thanks.