My mag release was almost frozen shut this morning, took two thumbs to get it to pop. No visual rust, no debris, oiled the heck out of it and it works again, but with a VERY noticeable "catch" at the end of the stroke, and a hesitation to "let go" back into position. During a stress mag change that could be "bad", with the new mag falling out before the catch returns to keep it in place. This is the Phantom poly frame, BTW. Fantastic pistol, just got night sights put on.